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Door Lock Actuator Replacement
 
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Pelican Technical Article:

Door Lock Actuator Replacement

Nick Czerula

Time:

1 hour1 hr

Tab:

$0

Talent:

*****

Tools:

Socket set, pliers

Applicable Models:

Mercedes-Benz W210 (1996-03)

Parts Required:

New door lock actuator

Hot Tip:

Take your time and work slowly

Performance Gain:

Door locks work again

Complementary Modification:

Replace door panel pop inserts.

In this article, we will go over what is involved with replacing the door lock actuators on the W210 Mercedes. These cars use a vacuum operated system to lock and unlock the doors. The system uses a vacuum pump mounted under the passenger seat to either suck or blow air through lines to each door. At each door, there is a vacuum diaphragm that over time can leak and eventually fail. By today's standards, this type of system may seem a bit illogical. In fact, nearly everyone I told about the system said, "Why wouldn't they just use a electric solenoid?" Back in the day, many mechanical systems on cars used vacuum to operate various components, such as flip-up headlights or windshield washers.

Nowadays, electronics are nearly foolproof and are cheap enough to use in almost any application. Mercedes started using vacuum operated locks sometime in the 1970's, when modern electronics were still expensive and not quite reliable enough to be used in a system that would be used so frequently. The W210 Mercedes was one of the last cars produced that still used the older, proven vacuum system before finally converting to electrically operated door locks.

Unfortunately, as the cars age, the components of the vacuum system can deteriorate, eventually leading to leaks that will typically prevent one door from locking while the others lock with no problem. The one door can still be locked manually by pressing the lock button down; however on some cars like ours, there is no lock cylinder on the driver's side door. This presents the problem of having to press the lock button down on the driver's door with the door closed. Obviously, not many people are going to want to press the lock button down from the passenger side or climb over the center console to exit the car.

The first step in replacing the actuator is to disconnect the battery. Remove the small plastic plate at the bottom of the rear passenger seat. Underneath is a 11mm nut holding the negative terminal from the battery to ground. Remove the nut and pull the cable off.

Remove the screw holding the door latch cover in place. Once removed, take the cover off. 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 "SRS Airbag" cover piece. Below is a Phillips head screw. Remove the screw and set it aside in a safe place. Also unscrew the door lock button. Remove the trim plug underneath the door pull. Beneath is a Phillips head screw as well. Remove the screw. Now 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. 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 front 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. Once removed, look inside. You'll see the metal hook connecting the door handle to the release latch. Lift the hook out to release it from the latch.

Now look at the backside of the seat adjustment switch. You'll see the electrical harness going to the switch Pull the harness out of the switch. Also pull the harness going to the lower door light out of the door panel. With the door panel removed, you'll see the plastic moisture barrier on the door panel. You'll want to carefully peel this off the inside of the door starting at the rear edge of the door. The idea is to peel it off in just a way so that it can be glued back onto the door later. Just let the plastic drape over the speaker at the front of the door.

At this point you should be able to see the yellow vacuum line leading to the lock actuator. Reconnect the battery for a short mechanical test. We want to use the key fob or the key to actuate the vacuum pump. As you do this, put your ear up close to the actuator. Listen for any hissing. More than likely, you'll hear it. If you do, this means that there is a leak in the actuator and it must be replaced.

The first step in replacing the door lock actuator is to disconnect the battery.
Figure 1

The first step in replacing the door lock actuator is to disconnect the battery. Remove the small plastic plate at the bottom of the rear passenger seat. Underneath is a 11mm nut holding the negative terminal from the battery to ground. Remove the nut and pull the cable off.

Remove the screw holding the door latch cover in place (green arrow).
Figure 2

Remove 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 3

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 â€Ã...
Figure 4

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 (purple arrow).

Remove the trim plug underneath the door pull.
Figure 5

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 6

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 7

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 front 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 8

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 9

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.

With the door panel removed, you'll see the plastic moisture barrier on the door panel.
Figure 10

With the door panel removed, you'll see the plastic moisture barrier on the door panel. You'll want to carefully peel this off the inside of the door starting at the rear edge of the door (green arrow). The idea is to peel it off in just a way so that it can be glued back onto the door later. Just let the plastic drape over the speaker at the front of the door.

Now pry out the plastic tab holding the IR sensor wiring harness to the door (green arrow).
Figure 11

Now pry out the plastic tab holding the IRE sensor wiring harness to the door (green arrow). Also cut the zip-tie holding the harness to the mounting tab on the left of the door airbag (purple arrow). Pull off the vacuum connection going to the door lock actuator (yellow arrow). Use caution when pulling the vacuum line off. It can be fragile and break.

Unfortunately, the wiring harness for the IR sensor runs directly under the door airbag.
Figure 12

Unfortunately, the wiring harness for the IRE sensor runs directly under the door airbag. You'll have to drill out the rivets holding the airbag to the door frame in order to free the harness. Shown here is the bottom rivet. Make sure that you disconnect the two terminals from the battery and short them together. Wait at least 30 minutes for the whole system to discharge before removing the airbag.

Here are the two top rivets holding the airbag to the door (green arrows).
Figure 13

Here are the two top rivets holding the airbag to the door (green arrows).

Once the airbag is free, pull the orange electrical connector out of the side of the airbag and set the airbag aside.
Figure 14

Once the airbag is free, pull the orange electrical connector out of the side of the airbag and set the airbag aside.

Shown here is the remaining wiring harness clip behind the airbag (green arrow).
Figure 15

Shown here is the remaining wiring harness clip behind the airbag (green arrow). Pop it out of the door to release the wire from the door. Keep in mind that you don't want to re-attach the battery with the IR wiring disconnected as it could trigger the vehicle immobilizer. If the car's security system detects that there is no signal from that door, it can think that the car has been broken into.

Remove the hook on the end of the inner door handle cable from the old door lock actuator.
Figure 16

Remove the hook on the end of the inner door handle cable from the old door lock actuator.

Pull the gasket out of the channel on the rear of the door.
Figure 17

Pull the gasket out of the channel on the rear of the door. You want to find the small access hole inside the channel. This will allow you to access the small 4mm Allen bolt that retains the IR sensor/Door handle (green arrow). Carefully loosen the bolt until you can remove the IR sensor on the door handle. Don't worry about dropping the bolt inside the door. It's held captive inside the handle assembly inside the door.

Now carefully pull the IR sensor out of the door handle from the outside.
Figure 18

Now carefully pull the IR sensor out of the door handle from the outside.

As you pull the IR sensor out, it should detach itself from the wiring harness connector underneath.
Figure 19

As you pull the IR sensor out, it should detach itself from the wiring harness connector underneath. If not, use a small screwdriver to gently separate it.

Pull the door handle back towards the edge of the door (green arrow).
Figure 20

Pull the door handle back towards the edge of the door (green arrow). This will detach the handle from the hinge point at the front. Once loose, set the door handle aside.

23
Figure 23

Notice the two Torx screws identified by the two green arrows holding the existing door lock actuator in place. Before you can remove the assembly, you will also need to remove the window guide. 

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Comments and Suggestions:
boh Comments: August 10 2016 Posting:

The FOB has seemed to fix it self. No issues. All locks work normal. Weird??

Thx for your reply back Nick.
August 25, 2016
  Followup from the Pelican Staff: Weird, I am sure the problem will return. Thanks for the note. - Nick at Pelican Parts  
boh Comments: I drive a E420 1997 Benz and I 'm having problems with the fob to lock & unlock. It works very intermittingly and I checked the fuses, PSE pump, fob has brand new battery. What else should I check? I'm taking it to a service shop and hopefully they can figure it out. Any help would be appreciated. I read the Benz manual about reprograming the fob and no success.

Thx
Boh
August 10, 2016
  Followup from the Pelican Staff: Without being able to test the signal using a scan tool, your only other way to know if it is the vehicle or the remote is to try a second remote. - Nick at Pelican Parts  
yelreppa Comments: Can anyone advise - Vehicle W210 E230 1997 Australian Model I have just replaced my Central Locking Pump with a second hand one after the original pump failed. The new pump is working when I press the remote key for all functions. But the doors, boot, back rests and fuel cap do not work at all even though the the pump running. I do not believe that I have any leaks in the system. The doors did lock and unlock with the old pump until it failed. Do I need to run the the engine to build up the vacumn in the system before it will operate the features correctly. I had the old pump disconnected for several weeks until I fitted the new pump.

I would appreciate any comment / solution if anyone out there can help.

Stuart.
August 6, 2016
  Followup from the Pelican Staff: If you hear the pump and it is not working, you either have the wrong pump or a leak. - Nick at Pelican Parts  
House Comments: Have a 96 E320 that I can only lock and unlock using the key into the trunk lock. All doors lock and unlock when I use the trunk. Is this an actuator or the line or pump?
August 6, 2016
  Followup from the Pelican Staff: Most likely the switch or wiring for the door lock cylinder. - Nick at Pelican Parts  
Dorothy Comments: Hello, I have a 1999 C 230 that has been the best car in the world for me, and I am hopeful to receive guidance re an issue I am having: About a year ago, the driver's side door began to give me problems, and now it is happening on the passenger side door too! It may be a locking issue, as all the doors unlock and lock just fine, and there are no issues when exiting the vehicle; however, when attempting to enter the vehicle on either side driver or passenger, the door will not most of the timeopen and I have to press the open symbol down for a few seconds to get the window to roll down so I can reach my hand in and manually open the door. Any guidance is greatly appreciated!

Dorothy
July 6, 2016
  Followup from the Pelican Staff: The issue is likely the connection between the handle and the door latch. I would remove the door panel and check which one is worn out. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
Aj Comments: Hi Nick,
Firstly I wanted to say how amazing it is/you are for the amount of people you've managed to help through this thread - thanks on belhalf, cheers.

Ok so I have a 1992 300e and my alarm not factory had been working well up until when I unlocked and locked it using the alarm and got my petrol lid stuck by not closing it properly and now my alarm won't activate any of the doors to un/lock? I'm guessing it's the drivers door where the alarm un/locking arm will be as they all respond incl the petrol & boot when I un/lock using the front passenger door but not when I manually do that with the drivers door??
Please let me know if you have any advice before I pull my love to pieces please!
Thanks and cheers in advance.
AJ
June 10, 2016
  Followup from the Pelican Staff: It's an aftermarket alarm?

it should arm and disarm with the driver lock cylinder. Try lubricating and cleaning the lock cylinder. I would assume it is coincidental and there is an issue with the driver lock switch. - Nick at Pelican Parts
 
Dwayne Comments: Replaced our central locking pump in our 99 CLK 320 convertible to try to get the doors to lock and unlock with the remote. got the trunk and passenger side doors working properly, but not the driver's side door lock. Could it be the actuator?
May 30, 2016
  Followup from the Pelican Staff: Yes, or the line. I would assume, if the system is sealed and not leaking the actuator is faulty. - Nick at Pelican Parts  
Klink Comments: Nick,
I have a 2001 W210 E320. Once the truck is open, the latch returns to the closed position preventing it from shutting. The key fob and interior trunk button become inoperable. Incidentally, the trunk light and trunk button light no longer work. After removing and replacing the fuse, it returns to operable for 1-2 more times. Any thoughts
February 10, 2016
  Followup from the Pelican Staff: The issue could be with the latch position switch. Best bet is to monitor switch position using a Mercedes-benz scan tool. If you don't have that option, try cleaning and lubricating the latch to see if the switch frees up. - Nick at Pelican Parts  
N448L Comments: Thank you Nick. I have been trying to find the part number for the PSE Control Module for the Power Door Lock Circuit. I am trying to find out how much one costs, but Pelican does not show it by name. I suspect it is a Mercedes dealer only part but I might be able to find one from a scrap yard.
December 23, 2015
  Followup from the Pelican Staff: I’m not the best with part numbers.

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
 
N448L Comments: Nick,
Looking at the wiring diagram, can I not just disconnect the plug at the control module under the rear seat. I think all the circuits except the trunk which I have already taken out of the loop get their ground through the control module and the control module gets its power from fuse 11 as does the central locking and theft switch. With the plug removed the control module would have no power. I should be able to check each of the component circuits for a short by using an ohm meter and checking the appropriate wire in the control module plug to see if it is shorted to ground. This should tell me which circuit and if none are grounded then maybe the module has a short in it.
December 22, 2015
  Followup from the Pelican Staff: You can try that. An ohm meter will not always show a short, that is not a good way to test. You will want to measure current on each wire. - Nick at Pelican Parts  
N448L Comments: 1997 420 S Door Locks

Thank you Nick, I will continue to test circuits. I presume there are several circuits connected to Fuse 11. Can I take the trunk fuse panel loose and unplug wires to fuse 11 one at time to narrow the search for the offending circuit?

December 21, 2015
  Followup from the Pelican Staff: Not exactly, unless there is a splice or junction there. You will have to use a wiring diagram and locate each component. - Nick at Pelican Parts  
Gordon Comments: Nick,
In your response to my December 13 question about 1997 S420 Fuse 11 blowing, the answer to the question "when the trunk latch is latched with a screw driver, does the fuse blow?" The answer is "yes." I disconnected the plug connecting the latch position switch to the trunk lights. With this plug undone, latching the trunk latch with a screw driver no longer blows the fuse. The fuse, however blows anytime the key fob is used on any of the doors or the dash door lock open or closed position on the dash door lock switch is pushed even with the plug connecting the trunk latch position switch and the trunk lights unplugged.
December 14, 2015
  Followup from the Pelican Staff: Then something else in the system is pulling too much current. You will have to monitor each component's current draw as you test. Locate the part of the circuit with the highest draw. - Nick at Pelican Parts  
Gordon Comments: 1997 S 420. Using Key Fob, key or door lock button or manually closing the trunk latch will cause fuse 11 20 amp to blow. Vacuum closing system works fine. Car has 65,000 miles, primarily driven by one driver usually driving alone. Any suggestions?
December 13, 2015
  Followup from the Pelican Staff: With the trunk open, latch the latch with a screwdriver, does the fuse blow? - Nick at Pelican Parts  
Ryan M Comments: I have a '96 E320 with no FOB. We only use the manual key and today it only moves back and forth in the lock but does nothing. We have to unlock the car with the spare key through the trunk. At that point all 4 pegs raise. The car starts and drives fine. Ideas?
December 1, 2015
  Followup from the Pelican Staff: Is the steering wheel jammed? Try rocking the wheel back and forth. - Nick at Pelican Parts  
Campingwagon Comments: I have a 2001 e320 4matic wagon with the tailgate not locking or unlocking on remote, all other doors lock fine. Took off the tailgate cover and can hear a hissing sound, suspecting a bad actuator...It's very hard to get to inside the tailgate, any write ups on this repair? Which actuator is used for the tailgate, same as the front or rear doors?
November 26, 2015
  Followup from the Pelican Staff: Likely a bad latch or connection.

We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.

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
 
Tammy Comments: Hi I have a 1998 Mercedes Benz e320. My key fob won't unlock or lock my doors. My windows don't even work or my seats. But my car starts could you please tell me what could be wrong thanks
November 14, 2015
  Followup from the Pelican Staff: You could have an issue with the front electronic module. I would start by checking the vehicle for fault codes. - Nick at Pelican Parts  
Cary Comments: How do you get the vaccum line out of the trunk latch w210 e300 1999. It's tough to get out. I'm trying to replace the latch.
November 12, 2015
  Followup from the Pelican Staff: There will either be a collar you squeeze to release it, or you press it in and hold, then pull line out. - Nick at Pelican Parts  
Skip Comments: Related question: The trunk on my 2001 e320 4matic has a new, similar issue. When my wife opened the trunk by pushing the button, the vacuum pump came on and ran for a bit. Don't remember it doing that before. Later that day the trunk was slow in responding to an open order from the fob. Still later, neither the fob or button would open the trunk. I fiddled with it and eventually got it open and moved everything out. My question is what should I be looking at to troubleshoot? The door locks still work and the fuel door still locks so the pump is probably fine. Do I need to replace the trunk lock? The hose to the trunk lock? How do I test? Any pointing of me in the right direction would be appreciated. You guys are great!
November 5, 2015
  Followup from the Pelican Staff: I would confirm the latch is being commanded to open and close when desired. if it is and is slow to respond, it is likely faulty. - Nick at Pelican Parts  
Al Comments: Very helpful for people having such problems with their vehicle!
I have a question please. After trying to reinstall the door panel of the rear door behind the driver's side, I pulled a cable without detaching anythingto fit it into one of the holes in the door pannel. Now, the door does not manually shut. Nothing is in the way. It doesn't shut even without the door pannel. I appreciate your feedback for this issue.
Thanks,
Al
November 2, 2015
  Followup from the Pelican Staff: Check if the latch is being held released. - Nick at Pelican Parts  
Lisa Comments: I have a 96 Merc E320 classic, the only way I can unlock the car is buy using the key in the drivers door, but this only unlocks that door, I then have to push the button on dash to unlock the rest. To lock them, I have to individually press the the locks down. Apart from the drivers door, which u can't press down, you have to use the key to lock it, what is the problem.
August 30, 2015
  Followup from the Pelican Staff: There may be an issue in the latch of the driver door. If the switch isn't being activated by the key, the locks won't activate. - Nick at Pelican Parts  
rmy Comments: My W210 E240 1999 will not lock using the central lock button on dash. Lock and unlock fine via remote and will unlock using the dash button. Will also lock automatically after reaching a certain speed. Is the problem with the dash button?
August 7, 2015
  Followup from the Pelican Staff: Sounds like it. - Nick at Pelican Parts  
sam Comments: need a door assist vac pump model 320 s 1977 wdb140 =part no =140800 1748
August 5, 2015
  Followup from the Pelican Staff: 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
 
Adrian Comments: Hello Nick! I own a 2002 e430 Mercedes and the passenger side door has to be slightly slam to close! Is this normal? And what can I do to make closing it easier! Adrian
July 28, 2015
  Followup from the Pelican Staff: The latch may be faulty. With the door open, close the latch by hand, does it latch or does it open back up until pushed in further? - Nick at Pelican Parts  
Walt Comments: Do you have the spring in side the drivers side door actuator on a 2002 c230. Thanks Walt Brown
April 17, 2015
  Followup from the Pelican Staff: 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
 
Naz Comments: After drilling out the two top rivets, how would hold back the airbag after replacing the actuator?.
April 1, 2015
  Followup from the Pelican Staff: You will need to reinstall it with new rivets. - Nick at Pelican Parts  
steve Comments: when shorting out the cables before removing air bag do I let the cables stay together for 30 minutes?
January 21, 2015
  Followup from the Pelican Staff: It's not necessary to short the cables together. Just disconnect the battery and allow the vehicle to sit for 15 - 20 minutes. - Nick at Pelican Parts  
LEROYDM Comments: Very informative article on c220 door lock, but where is the rest of it? It looks like I have to remove one of the window guides in order to remove the lock actuator assembly.is this true? I don't mind doing it,just that I think it should have been mentioned. thank you.
January 18, 2015
  Followup from the Pelican Staff: You may be correct, I recall the regulator having to come out. I will have someone check with the article author. - Nick at Pelican Parts  
Gilbert Comments: How do you change a fuel door actuator on a 1996 Mercedes S320? I could not open the door to fuel the car so I pulled on the actuator manual handle in the trunk and was able to open the fuel door. I have since ordered from Pelican a new actuator but do not know how to take the old one out to replace it with the one I got from your company. Can you help? Thanks
December 31, 2014
  Followup from the Pelican Staff:
We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.


I would think it is mounted in the fender, behind a trim panel. Check the trunk area. - Nick at Pelican Parts
 
leander Comments: Linkages? Do you mean take it apart and inspect the cable?
I am new to this stuff. Akso thanks for your help on this.
December 9, 2014
  Followup from the Pelican Staff: Yes, the cables and the levers / links they attach to. - Nick at Pelican Parts  
leander Comments: No it works fine opens and close on the door handle
December 9, 2014
  Followup from the Pelican Staff: Sounds like the latch might be your problem. I would inspect it and the attaching linkages. - Nick at Pelican Parts  
leander Comments: I have a clk320 1999. My drivers door out side handle works bout 10% of the time and when it does the door does not open all the way it hangs. Do i need a need lock act.?
December 7, 2014
  Followup from the Pelican Staff: Does the handle remain extended? (in the pulled position) If so, the handle or brakcet may be fault.y - Nick at Pelican Parts  
Wackavibez Comments: I have a 2000 ML550 and none of the locks are engaging with the remote. They also won't lock if I use the key. What do you think the problem is? If I press the lock or unlock button on the key it does not do anything
November 24, 2014
  Followup from the Pelican Staff: Sounds like the module thinks a door is open. Check if one of the doors reads open when all are closed. You will need a Mercedes-Benz scan tool. - Nick at Pelican Parts  
dralloc2011 Comments: I have a 1997 E 320 with a problematic door check strap. IT was not working smoothly at all so I pulled the door panel off and saw a screw was completely out. I fastened back but the door check still makes alot of noise and it doesnt work smoothly. I tried some Lithium grease but still no fix. How do you access the door check to pull it out? Do I have to drill out rivets in order to get it out?
September 30, 2014
  Followup from the Pelican Staff: The check is probably rusty. I think there is one bolt in the door jamb and two on the door side. I do not think you have to drill any rivets. - Nick at Pelican Parts  
Jerry Comments: I have a 2008 ML350 that the rear hatch actuator try's but just wont let the door open. Anyone replaced one of these, or have any suggestions. How long have hatchbacks been around? Automatic trunk lid openers even longer, how complicated does it have to be? Oh and don't forget to take away the ability to open it manually with a $400.00 Key!
September 24, 2014
  Followup from the Pelican Staff: I would check if the pump is corroded or if the fluid level is low. - Nick at Pelican Parts  
Dany Comments: Thanks again Nick-will get on with it and let you know how turns out-BTW car is exact replica of your 84 SL picture.

August 10, 2014
  Followup from the Pelican Staff: Thanks. Let me know what you find. - Nick at Pelican Parts  
Dany Comments: Thanks Nick,your reply is appreciated.The problem is a Chinese puzzle

If drivers inside lock in unlocked position- in neither drivers or passenger door will key turn to lock car

If drivers inside lock in locked position - then drivers door can be unlockedalong with trunkbut still will not lock but now passenger door can be unlocked and locked.

very confusing-? a door latch malfunction or vacuum problem?

Thanks dany
August 8, 2014
  Followup from the Pelican Staff: From that description, I would say door latch. - Nick at Pelican Parts  
Dany Comments: 1984 380 SL key will not turn to lock door on drivers side while passenger side key will still turn but also not lock vehicle.Still able to lock from inside door and also lock trunk.Does this sound like a vacuum leak or an inherent failure of lock mechanism.No idea from dealership.
August 5, 2014
  Followup from the Pelican Staff: Is just the driver door not locking? If so, likely the driver latch. - Nick at Pelican Parts  
Chris Comments: How do I put the airbag bag on/in so that it will function properly since we drilled the rivets to remove?
July 23, 2014
  Followup from the Pelican Staff: It would have to be reinstalled the way it was originally attached. You will likely need to use the correct rivets to attach it. Give our parts specialists a call at 1-888-280-7799 and they can help figure out which part or repair kit you need.
- Nick at Pelican Parts
 
Francey Comments: My body shop guy tells me I need to replace the Driver Door Lock Actuator for 1970 Mercedes 280SE - 108 series. Any idea where to find this part
June 6, 2014
  Followup from the Pelican Staff: It's in the door, attached to the latch. Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
doors want lock Comments: I have a S320 benz my doors will not lock . I have to use my ley What will
lock. I have to use the key What will
Make it do that?

May 7, 2014
  Followup from the Pelican Staff: Could be a faulty actuator or control module. I would start by checking the vehicle for fault codes. - Nick at Pelican Parts  
Stevo Comments: I have a 2001 S600. The front passenger door does not suck close. All others do. I am looking for the lock unit.
Thanks
Steven
February 4, 2014
  Followup from the Pelican Staff: Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
Kenneth Wang Comments: Do you have a guide for a 2008 c350 w204? I'm having trouble removing the actuator. Thank you!
January 13, 2014
  Followup from the Pelican Staff: We currently do not. If we have the chance to perform the repair, we will be sure to document it. - Nick at Pelican Parts  
wenzel1220 Comments: hello, my 1997 E 420 rear passenger side door lock will lock if car is triggered by the lock function or via remote yet will not unlock via the same two systems. Is this typical? are there two different vacuum lines?
November 7, 2013
  Followup from the Pelican Staff: No usually the PSE pump supplies vaccum to open locks and pressure to close. Sounds like you have a vad PSE unit - Kerry at Pelican Parts  
Frank Comments: How do you get a new ir sensor for the driver door , mine has been puncture . Ir sensor in the rear view mirror does not lock or unlock the doors. But when ignition switche is in on position the counsel lock does work , locks and unlocks . What part do I need .
Allready took it to mercedes dealer , could not locate the problem .
October 25, 2013
  Followup from the Pelican Staff: It is too difficult for me to tell if you need an ir module or the PSE module without having a scan tool connected to the car while you were hitting the remote button. Tell you mechanic to scope the wire from the remote control module to the PSE module to see if it is getting a signal. That's the way it is with American cars. Out ir sensors are in the rear view mirror on older cars and in the door handle on newer ones - Kerry at Pelican Parts  
topcatt89 Comments: The 2002 E series doesn't need the airbag drilled out or disconnected, the IR wire is routed around the top of the airbag and the connector is accessible on the rearward side of the airbag. Also, the door handle is held on the rear side by a spring attached to the door handle receiver inside the door. It must be put back behind the latch actuator lever and this spring when reassembled. You have to reach in on the inside to compress the spring while reinserting the outer door handle.
August 26, 2013
  Followup from the Pelican Staff: Thanks for the tips for our readers - Kerry at Pelican Parts  
erj1mercedes Comments: Hello. Any tech article on the rear door lock actuator on the w210?
July 13, 2013
  Followup from the Pelican Staff: Sorry, the W210 rear door procedure has not been done yet.
This should be on the future DIY list.
Thank you
-whunter-
 
Charles n Charge Comments: The heat melts the glue onto the locking rod. you can take some kneedle nose vice grips and pull really hard.but you will probally damage your plastic lock pull
December 28, 2012
  Followup from the Pelican Staff: This may work for getting it open.
However, the latch mechanism should be removed, cleaned, lubricated and exercised before reinstalling.
If it still does not work, it must be replaced.
roy@pelicanparts.com
 
Chistoso Comments: Most of the time it is the actuator in the rear door that fails. Do you have a tutorial on that?
September 25, 2012
  Followup from the Pelican Staff: I presently have the dashboard out of the W201. When I complete those projects, I will bring the W210 into the shop and create a tech article on the W210 rear door actuator.
- Steve at Pelican Parts
 

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