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Seat Adjustment Switch Repair and Replacement
 
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Pelican Technical Article:

Seat Adjustment Switch Repair and Replacement

Time:

3 hours3 hrs

Tab:

$300

Talent:

****

Tools:

Screwdrivers, multimeter, soldering iron

Applicable Models:

Mercedes-Benz W210 (1996-03)

Parts Required:

New seat switches (if needed)

Hot Tip:

Take your time, electrical testing can be tedious.

Performance Gain:

Seats (and steering wheel) can be adjusted again

Complementary Modification:

Replace window regulator.

The seats on the Mercedes W210 cars have no provision for manual adjustment. Everything is controlled by electric motors in the seat. The steering wheel position is also controlled by the switch on the driver's side door panel. On our project car, the steering wheel adjustment simply stopped working one day. At the same time, the functions on the switch somehow became reversed. When you pressed forward on the switch, the seat moved backward. Press backward and the seat moved forward. This can be caused by few different things. In the event that the functions become reversed or stop working, first try pushing the switch forward and holding it there for around ten seconds. This will cause the system to "relearn" the stop positions for the seat.

If this doesn't work, you can also try looking under both the driver's and passenger seats. You'll see an electrical harness going into each seat. Slide the plastic locking tab over to detach the harness from the seat control module under each seat. Pull the harness out and check the electrical connections inside for any corrosion. Sometimes a spilled drink can leave a sticky residue on there or prevent the circuit from making contact. If so, clean the switch and reseat it into the seat module. Turn the ignition on and check to see if all of the seat controls now work.

Sometimes, re-seating the electrical cables and moving the switches to full stop has no effect on the operation of the switch. In these cases, the last thing to try is re-flowing the solder joints on the circuit board. I have heard of situations where living near the ocean causes salt air to corrode the connections inside the switch. The corrosion from the salt air tends to weaken the solder joints on the boards, causing the connections to lose electrical continuity. At the very least, trying this might make the switch work again. If not, there is probably a fault in one or more of the various electronic components on the board. If you're really electronically savvy, you can test each circuit track for continuity and start testing each individual component on the board.

If the switch still doesn't operate the seats correctly after all of this, it probably needs to be replaced. New seat switches are available. There are two different types available based on the chassis number of your car. Sometime during production, the electrical harness to the seat switch changed, so make sure you check before ordering. Remember that electrical items are usually not returnable.

Shown here is the seat adjustment switch for the Mercedes Benz W210 chassis.
Figure 1

Shown here is the seat adjustment switch for the Mercedes Benz W210 chassis. The switch itself is a known failure item due to problems with the solder joints on the circuit board. In this article, we will go over the steps with removing, testing and attempting to repair the switch. Try moving the detents on the switch to full stop and hold them there for around ten seconds. This has the effect of resetting the stop points in the seat control modules under the seats.

Shown here is the wiring harness that plugs into the control module under each front seat.
Figure 2

Shown here is the wiring harness that plugs into the control module under each front seat. Reseating these connections can sometimes reset the seat module and the switch will start working again. Slide the plastic locking tab to the side to release the harness from the module. Re-insert the harness into the module, slide the locking tab to secure the harness and turn the ignition on. Check if the switch works now. If it doesn't, you'll need to remove the door panel to access the seat adjustment switch itself.

To remove the door panel, begin by removing the screw holding the door latch cover in place (green arrow).
Figure 3

To remove the door panel, begin by removing the screw holding the door latch cover in place (green arrow). Once removed, take the cover off.

Pry out the surround piece around the door handle.
Figure 4

Pry out the surround piece around the door handle. It just pops out. Underneath is a large Phillips head screw. Remove the screw and set it aside in a safe place.

Pry out the
Figure 5

Pry out the "SRS Airbag" cover piece (green arrow). Below is a Phillips head screw. Remove the screw and set it aside in a safe place. Also unscrew the door lock button counterclockwise until it pulls off the door lock rod (purple arrow).

Remove the trim plug underneath the door pull.
Figure 6

Remove the trim plug underneath the door pull. Beneath is a Phillips head screw as well. Remove the screw.

Pry out the light switch along the bottom edge of the door panel.
Figure 7

Pry out the light switch along the bottom edge of the door panel. Disconnect the wires going to the light.

You'll now need to take a large flat head screwdriver and pry the door panel off along the front bottom and back edges (green arrows).
Figure 8

You'll now need to take a large flat head screwdriver and pry the door panel off along the front bottom and back edges (green arrows).. There are a series of plastic clips holding it in. If you work your way around the edges, you'll be able to remove the panel without breaking any of the clips. If some do get broken, it's not a big deal as they are not expensive to replace (MBZ part number 011 988 76 78). There are nine of them around the perimeter of the door panel.

Once you have popped the edges of the door panel free, lift the door panel up to release it from the top edge of the door near the window.
Figure 9

Once you have popped the edges of the door panel free, lift the door panel up to release it from the top edge of the door near the window. Once removed, look inside. You'll see the metal hook connecting the door handle to the release latch. Lift the hook out (green arrow).

Now look at the backside of the seat adjustment switch.
Figure 10

Now look at the backside of the seat adjustment switch. You'll see the electrical harness going to the switch (green arrow). Pull the harness out of the switch. Also pull the harness going to the lower door light out of the door panel.

Now set the door panel down and look around the seat adjustment switch.
Figure 11

Now set the door panel down and look around the seat adjustment switch. The switch is held in by a series of push tabs around the edge of the switch (green arrows). Pull these tabs back to release the switch from the door panel.

Shown here is the switch removed from the door panel.
Figure 12

Shown here is the switch removed from the door panel.

To repair the switch, you'll need to need to remove the circuit board from inside the switch housing.
Figure 13

To repair the switch, you'll need to need to remove the circuit board from inside the switch housing. Begin by prying the back cover off the switch. This is done by placing a small flat head screwdriver into the slots shown here (green arrows).

Now turn the switch over and use two small screwdrivers to pry the headrest button straight off the switch (green arrows).
Figure 14

Now turn the switch over and use two small screwdrivers to pry the headrest button straight off the switch (green arrows).

Turn the switch over and remove the three small screws shown here (green arrows).
Figure 15

Turn the switch over and remove the three small screws shown here (purple arrows). Take care doing this as the screws are very small. You'll probably need a set of very small Phillips screwdrivers to loosen and remove the screws. At this point, you can remove the circuit board from the switch housing.

If you turn the circuit board over, you can get an idea of how the whole thing works.
Figure 16

If you turn the circuit board over, you can get an idea of how the whole thing works. It uses a series of switches to actuate different motors in the seat as well as the steering wheel.

Now comes the tricky part.
Figure 17

Now comes the tricky part. If you have electronics experience, you'll want to try and reflow all of the solder connections on the back of the board like shown here. The idea is to heat up each solder connection with a low-wattage soldering iron until the solder melts. As it melts, it will re-flow into the joint between the circuit board and the various electronics on the other side of the board. Take your time and be sure to hit each solder joint. Once finished, plug the electrical harness back into the switch and see if it works. If it does, you just saved yourself some money. If not, something in the switch itself is faulty and you'll need to order a new switch assembly.

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Comments and Suggestions:
David Comments: Thanks for having this great forum. It was very helpful.

Symptom was seat back would not recline when pushing on the seat back icon, but would move to proper position when using the memory buttons. Other functions worked properly so initial assumption was all motors worked properly, nothing physically stuck.

After disassembly of the right front door and the the switch unit on a 2002 E320, examination of the circuit board with a loop didn't show any bad joints. So before beginning to re-solder, with everything still disassembled, I just plugged the circuit board back into the door and everything worked! Lesson learned? Could be just a bit of corrosion on the multi-pin connectors. So next time, before opening up the switch unit, I will try cleaning the contacts on the cables and reconnecting. Still requires the time consuming removal of the door panel etc. but a positive outcome was achieved without further trauma. Otherwise, I will purchase a new switch unit from Pelican at their very reasonable price.

I had also been experiencing intermittent speaker drop-out on that door, so with the panel off, the speaker connector was easy to clean too, which also solved that problem.
October 9, 2016
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 
chief Comments: I have a 2008 CLS 550 the front passenger seat wont go forward or back,it will twist and turn toward the door, but all the other functions work correctly.
does anybody have an idea about this?
August 15, 2016
  Followup from the Pelican Staff: Sounds like the fore-aft motor is faulty. First confirm the motor is getting the signal to operate, if so, replace it. - Nick at Pelican Parts  
Dave Comments: Can open and fix the seat adjusting switch on 2005 Mercedes 350 slk
April 26, 2016
  Followup from the Pelican Staff: No, it needs to be replaced. - Nick at Pelican Parts  
kwhombre Comments: Want to remove cable connector for seat controller under driver's side as shown in picture above to clean with contact cleaner, but, can't figure out how to "unlock" it to remove connector.
April 13, 2016
  Followup from the Pelican Staff: Slide the connector lock to the left, the connector will unplug as you slide it. The photo shows the lock disengaged. - Nick at Pelican Parts  
Big Ed Comments: What type of socket do I need to remove a 1998 Mercedes E320 drivers seat? I also installed a passenger seat emulator instead of the pad assembly but have to have the SRS lamp extinguished. Will removing the battery grd cable suffice or do I have to go to a dealer?
March 14, 2016
  Followup from the Pelican Staff: External Torx, if I remember correctly. Either E10 or E12. - Nick at Pelican Parts  
Brian Comments: I have a 2004 S430 and with the drivers seat switch the seat moves in all directions except it does not recline back. If I move forward and then hit the seat memory button it will go back.
February 10, 2016
  Followup from the Pelican Staff: The switch is likely faulty.

- Nick at Pelican Parts
 
kramykram Comments: Happy New Year Pelican parts. I have a 2002 Mercedes c32. The passenger side seat switch is moving the drivers seat, not the passenger seat as it should. I have reset the ecu by unhooking the battery for 30 minutes as well as pressing the brake pedal to make sure all power was drained. I unhooked all plugs from each seat ecu with no luck either.
December 31, 2015
  Followup from the Pelican Staff: Sounds like a fault in the control module. Disconnecting the battery will not remedy it. You need to figure out if the issue is in the switch, module or wiring. I would start by checking the vehicle for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing.
- Nick at Pelican Parts
 
Rene Comments: What scan tool are you referring to? A OBD scanner? Will that pick faulty seat module? Thank you.
December 14, 2015
  Followup from the Pelican Staff: No, an advanced Mercedes-Benz scan tool is needed. - Nick at Pelican Parts  
2000 e430 Comments: I have a 2000 mercedes benz e430 and the driver side seat only goes back so far and stop. What could that be?
December 11, 2015
  Followup from the Pelican Staff: Something under it jammed or stopping it. Check for an obstruction. - Nick at Pelican Parts  
Rene Comments: I have 2000 C230 Kompressor and both seats intermittently works. I have replaced the seat relay in the trunk but did not help. I checked all of the fuses in the back. Any known problems with this? Any ideas?
December 10, 2015
  Followup from the Pelican Staff: COuld be a control module or bus issue. I would test the system using a scan tool. Run the seats and see they respond allt he time, if so, it could be the switch. - Nick at Pelican Parts  
haekals Comments: My w211 e260 2005 seat adjustment switch was broken, the part which control the head rest, both left and right.
Can you inform me about the part ?

November 20, 2015
  Followup from the Pelican Staff: You will have to replace the switch. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
E55 AMG V8 W211 Comments: My E 55 W211 left fron seat won't raise / lower anything else works
October 30, 2015
  Followup from the Pelican Staff: Likely a faulty switch or motor. Start by checking if the switch is sending power and ground to the motor when pressed. - Nick at Pelican Parts  
E55AMGW211 Comments: Everything works except Lower / Raise front seats, any ideas as all other works but when trying to Lower it I hear a click but NOT when trying to Raise them still nothing happens..
October 29, 2015
  Followup from the Pelican Staff: Likely a faulty switch or motor. Start by checking if the switch is sending power and ground to the motor when pressed. - Nick at Pelican Parts  
James Comments: I have a '99 C230 Kompressor Sport. Great car! After I shut 'er down and set the alarm, sometimes the emergency flashers come on by themselves for a while and then stop flashing. Anybody know what causes this to happen?
August 24, 2015
  Followup from the Pelican Staff: The alarm may be triggered when this happens. I would check if unlocking the door makes the lights go out. Then check the alarm module, I have seen them get wet and fail. - Nick at Pelican Parts  
agbatos Comments: I went to the auto parts store, could be an electronics store and bought a can of electronics cleaner spray, the kind that evaporates immediately and leaves no residue. It comes with a long red straw that you stick into the nozzle to direct the spray. I turned off the car completely and removed the key so nothing was energized. I squeezed the tip of the nozzle in the crack of the back seat switch and gave it two bursts. A grey residue seeped out the bottom and looked like fine dust. Cleaned that off, wiggled the switches, turned on the ignition tried the seat again, still pushing the switch backward moved the seat forward. Gave it another two bursts, wiggled it around and whala - the seat switch started working like new. I lived with for years and it was fixed in 15 minutes.
August 2, 2015
  Followup from the Pelican Staff: Thanks for the additional info. We appreciate it.
- Nick at Pelican Parts
 
slim Comments: i have a 2004 mercury grand marqie and the driver side will not move forward or back what needs to be done to make it work,could it be just the motot or switch or does the whole sysem need replaces?
June 28, 2015
  Followup from the Pelican Staff: I wouldn't know from a guess. You will have to check the signal to the motor when operating the switch. If there is a signal and the seat doesn't move, the motor is faulty. - Nick at Pelican Parts  
mark Comments: I have a 2000 e430 and my driver side and sometime passenger side windows and seats are inoperable,if I disconnect the negative on my battery and reconnect it works. Is there a module or something that needs replaced?
June 19, 2015
  Followup from the Pelican Staff: There is a seat control module behind the center of the dashboard. I would start by checking the vehicle for fault codes. I would assume one will be set. if none are set, see if you can communicate with the seat module when the problem is present. - Nick at Pelican Parts  
skipper1998 Comments: Hello I have a 2004 Mercedes E320. My driver and passenger seats are not adjusting nor the heat rest or the tilt wheel are not adjusting at all. any help would be greatly appreciated.
June 2, 2015
  Followup from the Pelican Staff: The seat control module is located behind the center of the dashboard. I would check for fault codes and see if you can activate the seats using a Mercedes-Benz scan tool. - Nick at Pelican Parts  
Gary C350 Comments: It is fully electronic. Strangely when comparing its movement or lack of movement to the passenger sider basically just playing around with the concept of re-learn it started working again! Thanks though. Would it have been ok to try disconnecting the battery for a system reset or would that create problems with other electronic settings?
June 1, 2015
  Followup from the Pelican Staff: I would suggest not disconnecting the battery. You could erase all adaptations and cause more work for yourself. - Nick at Pelican Parts  
Gary C350 Comments: we have a 2012 C Class Coupe 350 Mercedes the latch on a problem on the driver's seat and we had the latch replaced by the dealer it was out of warranty so they kind of did it under the table I think. my problem is the seat no longer moves forward when you pull the latch and I don't feel that the dealer representative wants to work with that situation. what kind of connection is there between the seat latch and the glide motor? would disconnecting and reconnecting the battery to reset the memory do any good?
May 31, 2015
  Followup from the Pelican Staff: Is this a manual seat? Then the handle would release locks on each side of the seat rail to allow it to slide. Check these locks. - Nick at Pelican Parts  
Richie Comments: My problem in my 2010 e350 coupe the driver seat backrest don't forward completely only move haft way,any suggestion?
May 19, 2015
  Followup from the Pelican Staff: Check if something is jammed in the drive motor or the seat rail. - Nick at Pelican Parts  
JR Comments: NEED HELP 1992 500SLPASS/ SIDE POWER SEAT MOVE BACK THEN ON IT OWN WILL MOVE FORWARD....AT TIME I WILL SET SEAT TO THE CORRECT STOP THEN WILL MOVE FORWARD--I HAVE EXTRA SEAT SWITCH,,,I TRY SAME THINK......THE STOP WORKING--I DID HEAR A CLICKING SOUND UNDER PASS SEAT AND AT TIME SEAT SWITCH WILL WORK....CHECK ALL CONNECTORS TO POWER MODULE UNDER SEAT IT OK....NOW SEAT DOSE-NOT WORK
May 19, 2015
  Followup from the Pelican Staff: Could be a faulty motor. Check if the motor is receiving power and ground when you request a position change. - Nick at Pelican Parts  
XTRAK2 Comments: I have a 2002 C240. the drivers side seat does not work. I replaced the control seat module; however, it still does not work. I replaced the passenger side control seat module and it works. Any ideas what else I can check? Thanks.
May 2, 2015
  Followup from the Pelican Staff: Try to run the seat using a scan tool. If the seat moves, if may be the input to the module. - Nick at Pelican Parts  
Chubbize Comments: I have a 2004 E320 Mercedes Benz. The drivers seat controller is not working at all. What advice can you give me to fix this issue?
April 28, 2015
  Followup from the Pelican Staff: Check function and fault storage using a Mercedes-Benz scan tool. Once you determine if it is the module or switches, you can replace the faulty part. - Nick at Pelican Parts  
Steve Comments: 2000 E320 Wagon - Driver's seat upholstery is ripped and stained. I have a nice replacement seat, same year/model/color, from a junk yard. How would I test all of the motors on the replacement seat while it is out of the car to make sure they are working BEFORE I pull out the old seat and install the new one? Thanks!
April 27, 2015
  Followup from the Pelican Staff: You can manually activate the motors using fused power and ground. - Nick at Pelican Parts  
steve Comments: Related question: 2000 E320 wagon - Steering wheel tilt not working and no motor sound when switch is activated up or down. The in/out adjustment works fine, so the motor is working. Very faint "click" sound when switch is pressed up or down but no motor sound. Any idea where to look? Where are the relays located for the steering wheel adjustment circuit on this car? Thanks!
April 27, 2015
  Followup from the Pelican Staff: Both of the functions for the steering wheel are controlled by the left seat adjustment module. You can check power and ground the to the fore aft motor when the problem is present. This could confirm or deny a faulty motor. - Nick at Pelican Parts  
Whip Comments: I have a 2004 SL 500, the two position switch located at the top of each seatback outboard will not move the seatback forward or aft when pressed. I tested the wires going to the switch shows approx 12 volts entering the switch!! any ideas or additional testing would be most helpful!! B Whipple
April 18, 2015
  Followup from the Pelican Staff: When you press the switch, is voltage sent across it? If so, the seat module may be at fault. You will have to test to see if the signal does in fact get to it, to confirm it is not a wiring harness issue. - Nick at Pelican Parts  
rjoseph777 Comments: I changed everything, & the seat still won't move ? & I'm stock can't get in or out or drive I'm 6"6 & the seat is stock to someone about 5"7 plus I'm paralyzed & I have to use hand control to drive . Thank you if any one can halo me with this problem I appreciate it
January 30, 2015
  Followup from the Pelican Staff: What did you replace? What kind of car are you working on? WHat is the issue, what direction does it not move in? - Nick at Pelican Parts  
rkn98e320 Comments: This was super helpful! I had one issue when popping the door clips off. I'm pretty sure its just the age of the car, but it seemed great, each one was coming out popping seemed right. When i looked at the back of the door panel i realized all but one had actually been the bracket glue coming off! I am currently waiting for the glue to dry on all of them now. Just something to be leary of. It even sounded right!Not a hard fix but just a caution. Mine is a 1998 e320. Thank you for the awesome article! I replaced my switch, but I'm going to try reflowing the old boards solder and fixing it anyway.
January 25, 2015
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 
Will Comments: It was very helpful
January 21, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Fuqua Comments: Thank you, Nick! Very helpful. This will work!
January 16, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Fuqua Comments: The power seats in my 1996 S320V do not work. The controls are on the door panels. Neither of the front seats work in any position; forward, back, up, down. etc. Are these controlled by fuses, relays, modules, computer or what? Any assistance will be appreciated! Thank you!!
January 15, 2015
  Followup from the Pelican Staff: There are modules that help to send the signals to the seat. Check if the connections under the seat are OK. Then I would check the vehicle for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing.
- Nick at Pelican Parts
 
Andre C Comments: My Problem is with the 2003 CLK 430 Driver side seat it is LOCK in the same Position, the bottom pat of the seat does not move at all anymore, the company I tried taken the car too used another company that sent over two different seat neither one work, so they sent them back with very little chance of the problem being solve, so now I am trying to find away to get the seat working again on my own, can you please give me some advice to my Adjustment Issue.
December 14, 2014
  Followup from the Pelican Staff: You can figure out if it is the seat or the control module. Test the seat activation using a Mercedes-Benz scan tool. - Nick at Pelican Parts  
George Comments: Mercedes Benz 1999 E320 My passenger seat does not move forward or backwards. It only moves up and down.
What do I do?
December 7, 2014
  Followup from the Pelican Staff: Check if is the switch or the motor. Check the signal to raise or lower motor. - Nick at Pelican Parts  
Paul Comments: I'm trying to install E520 seats in a 36 Chevy. The wiring harness is cut below the seats and I can't figure out which wires work which motor action, can you help?
November 20, 2014
  Followup from the Pelican Staff: I don't have wiring to share for that model. I would grab a repair manual. It will have the wiring.
Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
chuy Comments: Tengo un MB 1997 mod. S500 y los acientos delanteros no se mueven compre los acientos nuevos pero no los puedo instalar porque no puedo mover los acientos viejos como le hago para quitar los acientos viejos manuelmente ya que electricamente no se mueven
November 2, 2014
  Followup from the Pelican Staff: Sorry, your question did not translate well for me. Can you re-ask in english? - Nick at Pelican Parts  
Bob Comments: My 2010 S550 driver side seat does not forward or backward, no tilt,no headrest.The passenger side works fine. any suggestion?
November 1, 2014
  Followup from the Pelican Staff: COuld be the seat module. Start by checking the vehicle for fault codes. - Nick at Pelican Parts  
Ahmed Comments: 2004 CLK320 driver seat adjustment buttons and steering column adjustment are not working any ideas?
October 25, 2014
  Followup from the Pelican Staff: I would think it could be the upper control panel control module. Perform a full scan of the vehicle. There are likely fault codes set. - Nick at Pelican Parts  
Jim Comments: Thank you, Nick, for the clarification. Back to the drawing board for me on this. -Jim
October 6, 2014
  Followup from the Pelican Staff: No problem, glad to help. - Nick at Pelican Parts  
Jim Comments: Thank you, Nick, for the clarification. Back to the drawing board for me on this. -Jim
October 6, 2014
  Followup from the Pelican Staff: No problem, glad to help. - Nick at Pelican Parts  
Jim Comments: I am trying to figure out how finangle the front seats on a 2015 S550 so that a short-statured driver and passenger can see over the wheel and dash-need to raise the seat 2" from its highest stock position. Can this be done by manipulating the particular ECM? May have to switch out front headrests to back headrests they do not reach the headrest anyway if that is a limiter. Or, will we need to build additional rise in the rail which will also require lowering the car so they can enter it. . . Thank you for your consideration of this question for well-deserving people.
September 27, 2014
  Followup from the Pelican Staff: The height is limited by the adjustment motors and brackets of the seats. You can ass a cushion on the seat. - Nick at Pelican Parts  
Jim Comments: I am trying to figure out how finangle the front seats on a 2015 S550 so that a short-statured driver and passenger can see over the wheel and dash-need to raise the seat 2" from its highest stock position. Can this be done by manipulating the particular ECM? May have to switch out front headrests to back headrests they do not reach the headrest anyway if that is a limiter. Or, will we need to build additional rise in the rail which will also require lowering the car so they can enter it. . . Thank you for your consideration of this question for well-deserving people.
September 27, 2014
  Followup from the Pelican Staff: The height is limited by the adjustment motors and brackets of the seats. You can ass a cushion on the seat. - Nick at Pelican Parts  
chris Comments: 2011 e55 amg pass. seat replacement goes back but not forward?
August 29, 2014
  Followup from the Pelican Staff: I would suspect the switch. - Nick at Pelican Parts  
Dave Comments: How do i remove the left front lower seat cushion in my 1995 e320 sedan.thank you.
August 18, 2014
  Followup from the Pelican Staff: We don't currently have that tech article. I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
YSJ Comments: NOT THE WINDSHIELD WASHER/TURN SIGNAL, THE POWER WINDOWS AND POWER SEATS. THATS OKAY I'LL FIND IT MYSELF, THANKS FOR TRYING THOUGH.
August 11, 2014
  Followup from the Pelican Staff: I gave the info on the fuse you were searching for. If it does not match your problem, it is not the fuse you should be chasing. Good Luck - Nick at Pelican Parts  
YSJ Comments: I DID CHECK EVERY FUSE IN ALL THREE FUSE BOXES AND THERE IS NOT A BLOWN FUSE ANYWHERE. AM IN THE PROCESS OF TROUBLESHOOTING THE POWER SEAT WIRING FROM FUSE TO SEAT. I HAVE THE RIGHT REAR WINDOW THAT WORKS, AND HAVE INSTALLED A NEW CONSOLE COMBINATION SEAT/WINDOW SWITCH.
August 8, 2014
  Followup from the Pelican Staff: My information says it is a 10 amp fuse, in the engine compartment fuse panel. It powers the windshield washer functions and turn signals. - Nick at Pelican Parts  
YSJ Comments: I HAVE CHECKED THE OWNERS MANUAL. NOTHING THERE. HAVE CHECKED THE SERVICE MANUAL, THEY SAY FUSE #22, OF WHICH I DON'T HAVE. NOT EVEN A EMPTY SLOT.
August 8, 2014
  Followup from the Pelican Staff: My information says it is a 10 amp fuse, in the engine compartment fuse panel. - Nick at Pelican Parts  
YSJ Comments: I HAVE SEEN IT ON MANY FORUMS THAT FUSE #22 IN THE ENGINE BAY FUSE BOX SHOULD NOT BE BLOWN , AS TO ALLOW THE SEATS AND WINDOWS TO WORK. MY 1998 E320 W210 DOES NOT HAVE A #22 FUSE IN THE ENGINE BAY FUSE BOX. CAN ANYONE HELP ME FIND THE MISSING FUSE???
August 3, 2014
  Followup from the Pelican Staff: Your vehicle may not utilize fuse 22. Did you check your owner's manual to see if it is equipped? - Nick at Pelican Parts  
Lou Comments: Hello , my name is Lou and I am in desperate need of assistance !! I am a personal chauffer for a family for the last 20 yrs . My boss recently has purchased a new 2015 S550 mercedes and would like me to drive him in this vehicle . Here is my dilemma !! I suffer from MS and it has become difficult to exit this car , for it is a bit too low and on bad days it is impossible to get up from the seat even at its highest setting . I really need some way to raise the seat a few more inches , maybe spacers or something that gives me the confidence of being able to do my job !
Which is getting the door ! My boss has been extremely patient and has even purchased the ML for now but he has recently injured his shoulder and driving in a truck in NYC is absolutley terrible !! Basically the roads suck !! I really need help getting me into the new car ! Well haha actually getting me out . Please i do not want to loose my job !! I cannot even tell how important this is to my SURVIVAL !! I only have me no family and my job is everything ! Please help ! Thank you for your time and i will pray that i hear back from you ? With some good possibilities ... God Bless Lou
June 25, 2014
  Followup from the Pelican Staff: Remove a seat bolts, then find a bolt long enough to accommodate a spacer of the washers of the desired height. - Nick at Pelican Parts  
Nicky Comments: Deoxit worked. A spray bottle costs ~ $15 on internet, a few more at your local Radio Shack.
Programmed all three presets, that worked even without deoxit. Should be good for a while, even if it recurs the presets are good.
Guide is good, but I didn't bother removing door opening cable, just carefully hung door panel for the 5 minutes it took to get the switch out, sprayed, and back.
June 15, 2014
  Followup from the Pelican Staff: Thanks for the additional info. We appreciate it.
- Nick at Pelican Parts
 
tahitai Comments: Never mind, figured it out. This forum has been so helpful!
May 30, 2014
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
tahitai Comments: In figure 2, where and what exactly is the plastic locking tab on the wiring harness. I am not intuitive at this and don't want to break something. Force doesn't seem to work.
May 30, 2014
  Followup from the Pelican Staff: See attached photo. Green arrow points to locking tab. - Nick at Pelican Parts
Nick Comments: My 1997E300d had seats that would only go forward. Read this.
But instead if reflow solder, it looked like pcb had minor corrosion so sprayed back and inside of switched with De-Oxit. Miracle at cleaning old electrics. Worked perfectly again after this. Sprayed with the protector to keep from oxidizing again. Job was 45 minutes total.
May 25, 2014
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 
street sweeper Comments: I have a 94 e420 I unbolted the drivers seat to run rca cables to the trunk and now the power seat wont work. any ideas
May 2, 2014
  Followup from the Pelican Staff: I would check if you have something unplugged or plugged in wrong. - Nick at Pelican Parts  
Nick Comments: My driver seat is not moving with driver-door button, but moves inversely with the passenger seat. When I move the passenger seat forward, my driver seat simultaneously moves back. Any idea what this could be? My shop said it was whichever SAM unit controlled the driver seat and wanted me to replace it. It is a CLK320 2005 W209.
April 29, 2014
  Followup from the Pelican Staff: It does sound like a module fault. The front SAM would work those. It will have to be programmed when replacing. - Nick at Pelican Parts  
gyaltsen Comments: I have 98 e300. The passanger seat won't go forward or backward. All the other seat parts work fine. You can hear a clicking sound that the motor under the seat is getting power. just no movement. You said:

Followup from the Pelican Staff: My best guess would be damaged motor or linkage.
This would need at least partial disassembly of the seat for diagnosis.

could you give troubleshooting steps for this?
Thanks
-whunter "
April 24, 2014
  Followup from the Pelican Staff: Remove seat, inspect motor and drive cable. - Nick at Pelican Parts  
Jules9987 Comments: Thanks so much! Just saved me $350! It was the wiring harness in my case and I never would have thought of that without your post!
April 9, 2014
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
rw Comments: I have a 2006 Mercedes c230 and the passenger seat control module is causing the battery to drain. Is this something I can have reset or do I have to purchase a new one?
-Rw
March 19, 2014
  Followup from the Pelican Staff: If a module is draining the battery, replacement is usually required. - Nick at Pelican Parts  
Rog Comments: I took my 2007 C280 to MB to change my Ignition Switch last week. I picked up my car and right away at the dealer's parking lot noticed that I could not bring my seat forward. The electrician there came and noticed that all the front driver passenger seat movement are mixed, forward bring the steering wheel down, back tilt bring the seat forward, and so on. The seat was moving correctly before I dropped it off. They diagnosed it out and said the door and seat control unit need to be changed or one of the control unit needs to be changed. Does that make any sense?
February 7, 2014
  Followup from the Pelican Staff: Parts fail at the oddest of times. Could be a coincidence. - Nick at Pelican Parts  
Taj Comments: I messed up n said air pump cuse of the idol surge issue,it's sounds like a bearing or pulley is going bad in the area where altonator and air pump is.. So I was writing to u with that issue on my mind..n forgot that I wrote to u about the power seat issue.. Sorry
January 9, 2014
  Followup from the Pelican Staff: No problem. Glad to help. - Nick at Pelican Parts  
Taj Comments: I was thinking its the air pump cuse the pulley or bearing makes noise when car runs
January 4, 2014
  Followup from the Pelican Staff: The air pump should not cause the seats to fail. - Nick at Pelican Parts  
Taj Comments: I have a 93 w124 3.2 I bought the car like this's the front seats never moved both driver and passenger.. I need help don't know what to do the head rest are stuck high as well both seat switches don't move the seats don't kno where to begin
January 1, 2014
  Followup from the Pelican Staff: Start by checking the fuses. Especially if both are not working. Might be a common failure between the two. - Nick at Pelican Parts  
bigE Comments: 2003 CLK 430 CV, both front seats will not fold forward in order for a rear passenger to get into the back seat.
December 5, 2013
  Followup from the Pelican Staff: Did they both fail at the same time? Does the release handle work? The cables could be broken. - Nick at Pelican Parts  
Don Comments: The passenger side seat of my CLK320 will not go forward or backwards anymore. Every once and awhile I would reach over and it would surprisingly work for a short period. All the other parts of the seat control works great. I also replaced the seat control on that side and it's still doing the same thing.. Any suggestions.
November 19, 2013
  Followup from the Pelican Staff: Have you looked at the fore / aft motor? When it isn't working, operate the switch while tapping on the motor. If it begins to work, the motor is faulty.- Nick at Pelican Parts  
Ray Comments: Damn it Porkchop your a god damn genius. The smack fix worked.
November 13, 2013
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
grezat Comments: My 2003 C240 driver seat doesn't go forward and back. Every time I push push the switch it makes a little clicking voice but the motor doesn't work and the seat doesn't move. Is it time to order the motor or I need to check for connectivity?
Thank you,
November 12, 2013
  Followup from the Pelican Staff: Check to see if any wiring in the door hinges is broken from opening and closing the door. - Kerry at Pelican Parts  
Jeff Comments: My 07 e63 AMG seat controls work but passenger seat only goes so far. It stops at a certain point. It's a tight fit for anyone who wants to sit in the passenger seat especially if they're tall. Seat doesn't want to move back far enough.
October 11, 2013
  Followup from the Pelican Staff: I would look under the seat and in the seat rail for any thing that could be blocking it or jamming it up.
- Nick at Pelican Parts
 
Harry Comments: Kerry:
Thanks for the reply on by seat problem. Since then I have had the car at MB of Annapolis. They replaced control, replace motor and gave be back the car. When I got in it the seat refused to move. They gave me a free loaner and kept the car for 4 days with intermittent seat operation but could not find a problem. SO!! They removed the new parts and gave me back the car at NO CHARGE!! When I got it the seat was working. My wife put it where she wanted it and I removed the 2 fuses.
There must be a loose wire somewhere!
Harry
September 26, 2013
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
Harry Comments: My 99 E300 TD passenger seat stopped working completely! No tilt, no up/down no forward or backward. Holding any button in any position for 10 sec makes no motion occur. Driver side is great.
Never any intermittent problems.
Is there a fuse and where is it? Is there only one source of power to the switch?
Any help would be great.
September 10, 2013
  Followup from the Pelican Staff: Look at fuses 8 and 9 in the fusse box mounted under the seat. They are both 25 amp fuses - Kerry at Pelican Parts  
Jay Comments: Unfortunately, your part did not resolve the problem. I now have a very expensive part that apparently was not the source. It appears the connection or the box where the wire plugs into is the source problem. I managed to do some nice damage to my door, as I didn't realize the screw was underneath the actual plastic PLUG SRS not the whole panel. Also as parts are 14 years glued, some are coming apart for the door frame, so I need to get some gorilla glue or equivalent. VERY FRUSTRATING and ULTIMATELY FRUITLESS. I will have to go back and do this again with contact cleaner as it worked briefly. Might as well keep the part, I left it in. Restocking fee + Shipping makes it pointless to return a 130$ part.
July 30, 2013
  Followup from the Pelican Staff: Glad to hear you have isolated the issue, it sounds like wire or connector damage.
I face the aged plastic issue many times per day, slow and caution is my answer.
Best wishes.
- whunter
 
Jay Comments: Salvage yard offers one for 75$ - new its $135. Guess its time to roll the dice...
July 18, 2013
  Followup from the Pelican Staff: As mentioned, the odds are not good.
However; I still wish you best of luck, and hope it resolves your issue.

-whunter-
 
jay Comments: Is there ANY way to clean the actual black plastic actuator switch? Perhaps its just a faulty contact that results in one way movement of my seat back forward only. ?
July 18, 2013
  Followup from the Pelican Staff: In theory yes you can clean the switch contacts.
However, on this model, most of the time it is not a poor contact in the mechanical switch.
Sorry, there are currently no plans for a diy on this.

-whunter-
 
Tony Comments: Thanks for the detailed process of removing the panel and switch. You folks are great....I'll buy all my parts from Pelican
July 7, 2013
  Followup from the Pelican Staff: Glad this DIY was helpful.
-whunter-
 
Bill Comments: I have clk 55 amg. The driver seat won't go forward or backward. All the other seat parts work fine. You can hear a clicking sound that the motor under the seat is getting power. Any thoughts
June 4, 2013
  Followup from the Pelican Staff: My best guess would be damaged motor or linkage.
This would need at least partial disassembly of the seat for diagnosis.
-whunter
 
Porkchop Comments: To be more specific...Mine would only move forward. Even when trying to go back it would go forward instead.
May 28, 2013
  Followup from the Pelican Staff: My best guess is the switch or wire shorted.
- whunter
 
Porkchop Comments: Mine did that also. I smacked the door panel next to the switch pretty hard and it started working properly. Maybe some corrosion or dirty connection inside the switch. May be able to remove the switch and clean some contacts, but I haven't had to mess with it yet...It's been working for a few weeks so far since I smacked it!
May 28, 2013
  Followup from the Pelican Staff: That sounds like corrosion jarred loose by the pounding. cleaning would be a good idea.
- whunter
 
Sing@HK Comments: it works !!! Thanks a lot !!!
March 24, 2013
  Followup from the Pelican Staff: You are welcome, glad it helped you.
roy@pelicanparts.com
 
Hakan Comments: My problem is that either puch forward or back, the seat goes forward. Only the way it goes back is by using one of the 3 preset position. Any suggestion?
March 18, 2013
  Followup from the Pelican Staff: Typically this means the switch is damaged, and needs to be replaced.
roy@pelicanparts.com
 

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