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Pelican Technical Article:

Seats Replacement

Steve Vernon

Time:

2 hours2 hrs

Tab:

$150 to $600

Talent:

**

Tools:

Trim removal tool, 10mm, 13mm, 15mm socket, E12 socket, T45 Torx driver

Applicable Models:

Mercedes-Benz W203 (2001-07)

Parts Required:

Seats, seat parts

Hot Tip:

Have a vacuum ready for the carpet under the seats

Performance Gain:

Access to seat switches and components beneath seats

Complementary Modification:

Clean carpet and interior beneath seats

If you have to remove the seats from your Mercedes C320 to replace them or service components beneath them, for example the fuel pump or front seat switches, in this tech article I will show you how. Once removed, you can repair items like the seat switches, the seat module or motors; or in the rear, the fuel pump or seat belt buckles. I will break this article down into front and rear seats. Though there are a lot of options for different seats and configurations in the Mercedes C-Class the procedures are basically the same. Our project car had the flat rear bench seat with no split fold or pass through.

Front Seat

Begin by moving your seat as far forward as it will go. Then, remove the two E12 Reverse Torx mounting fasteners at the rear seat rails.

Next, you will have to remove the seat belt from the front seat. Use your trim tool and lever off the trim panel on front seat to expose seat belt fastener. Use a T45 Torx and remove the lower mounting point of the belt from the seat. I also like to remove the lower seat trim panel at this point as it is easy to damage when removing the seat from the car and expensive to replace. Better safe than sorry.

Once the seat belt, fasteners and trim are removed from your seat move the seat all the way rearward to expose the seat module electrical connector and front mounting bolts.

Remove the two E12 reverse Torx bolts from the front rails. Tilt the seat back and remove the three electrical connectors from the seat module.

You can now carefully remove the seat from the car. The rear panel is held in place by two T20 Torx screws. Unscrew them and slip the panel down and off.

Rear Seats

Begin by removing the rear seat cushion. There are four 13mm nuts holding the bottom cushion to the body. Remove the nuts and lift the cushion up and out of the vehicle.

With the cushion removed you can use a T45 Torx and remove the center rear seat belt anchor point.

Next remove the T45 Torx and 13 nut holding the child safety seat anchor bar. Remove the two 15mm nuts holding the center rear backrest along with the 10mm screws on each side.

Move to the trunk and remove the two plastic covers over the backrest release catch. You have to use a flathead screwdriver and lever the release (red arrow) away from release stop. While you lever, push seat back toward interior of vehicle. You will know when it releases as it frees up a bit from the body.

Now tilt the back seat cushion forward and pull up to remove from side mounting points. Once out, remove cushion from vehicle.

Installation is the reverse of removal.

Front Seat
Start by moving your seat as far forward as it will go.
Figure 1

Start by moving your seat as far forward as it will go. Then, remove the two T45 Torx mounting fasteners at the seat rails (red arrows).

Next, you will have to remove the seat belt from the front seat.
Figure 2

Next, you will have to remove the seat belt from the front seat. Lever off the trim panel on front seat to expose seat belt fastener (red arrow).

Use a T45 Torx and remove the lower mounting point of the belt from the seat (red arrow).
Figure 3

Use a T45 Torx and remove the lower mounting point of the belt from the seat (red arrow).

I also like to remove the lower seat trim panel (red arrow) at this point as it is easy to damage when removing the seat from the car and expensive to replace.
Figure 4

I also like to remove the lower seat trim panel (red arrow) at this point as it is easy to damage when removing the seat from the car and expensive to replace. Better safe than sorry.

Once the seat belt, fasteners and trim are removed from your seat, move the seat all the way rearward to expose the seat module electrical connector and front mounting bolts.
Figure 5

Once the seat belt, fasteners and trim are removed from your seat, move the seat all the way rearward to expose the seat module electrical connector and front mounting bolts. Remove the two E12 reverse Torx bolts from the front rails (red arrow, one shown).

Tilt the seat back and remove the three electrical connectors from the seat module (red arrows).
Figure 6

Tilt the seat back and remove the three electrical connectors from the seat module (red arrows).

You can now carefully remove the seat from the car.
Figure 7

You can now carefully remove the seat from the car. The rear panel is held in place by two T20 Torx screws (red arrows). Unscrew them and slip the panel down and off. To install reverse removal steps.

Rear Seat
Begin by removing the rear seat cushion.
Figure 8

Begin by removing the rear seat cushion. There are four 13mm nuts holding the bottom cushion to the body (red arrows, two shown). Remove the nuts and lift the cushion up and out of the vehicle. You can also see in this picture the catches for the child safety seat (yellow arrows).

With the cushion removed you can use a T45 Torx and remove the center rear seat belt anchor point.
Figure 9

With the cushion removed you can use a T45 Torx and remove the center rear seat belt anchor point.

Next remove the T45 Torx (yellow arrow) and 13mm nuts (green arrow) holding the child safety seat anchor bar.
Figure 10

Next remove the T45 Torx (yellow arrow) and 13mm nuts (green arrow) holding the child safety seat anchor bar. Remove the two 15mm nuts (blue arrow, one shown) holding the center rear backrest along with the 10 mm screws on each side (red arrow, one shown).

Working in the trunk you have to use a flathead screwdriver and lever release (red arrow) away from release stop.
Figure 11

Working in the trunk you have to use a flathead screwdriver and lever release (red arrow) away from release stop. While you lever, push seat back toward interior of vehicle. You will know when it releases as it frees up a bit from the body. Now tilt the back seat cushion forward and pull up to remove from side mounting points. Once out, remove cushion from vehicle.

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Comments and Suggestions:
walt Comments: my vehicle is a 2003 c240 it has the manual seat cushion tilt knob that i need to remove to replace the trim. can you tell me the proper method to remove? thank you
August 25, 2016
  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 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
 
walt Comments: my seat has the manual seat cushion tilt knob that i need to remove to replace the trim. can you tell me the proper method to remove? thank you
August 24, 2016
  Followup from the Pelican Staff: You didn't mention what vehicle you have. Some models have a cover that hides a fastener. You can check if that is the case for your vehicle. - Nick at Pelican Parts  
John Comments: Thanks for the information regarding the front seat, it will certainly help if my hands are small enough to get in there. John
August 10, 2016
  Followup from the Pelican Staff: Let us know how ti works out. - Nick at Pelican Parts  
John Comments: I appreciate the regarding the front drivers seat removal, however my wife was driving the car when the seat decided it wasn't going to move backwards and unfortunately l can not get to the front track mounting bolts. Any sugestions as to how I can move the seat to replace the motor. It is definitely the forward and back motor as all the other switch functions are working.

August 7, 2016
  Followup from the Pelican Staff: You will have to remove the motor, then manually move the seat drive using a hand tool. - Nick at Pelican Parts  
WJ Comments: This site is even better than the factory service repair manual. Love it. Problems solved!
May 23, 2016
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Oze Comments: I purchased a ML320 Mercedes year 2000 in excellent shape. Unfortunately all 4 seat belts are stuck. It has not been in an accident. Is there an activation relay that has to be reset?
November 16, 2015
  Followup from the Pelican Staff: Not that I am aware of. I would check for fault codes to see if the belts were triggered. - Nick at Pelican Parts  
Jay Comments: If I remove the seat, do I need to disconnect the battery? I have heard many stories where people had troubles with the SRS when removing seat without disconnecting power.

Please advise me of any precautions before removing the seat
November 1, 2015
  Followup from the Pelican Staff: I would disconnect the battery to avoid SRS faults. - Nick at Pelican Parts  
Jisan Comments: Hi,

My driver seat base is currently quite loose, it slightly tilts forward when applying pressure on front end and also seat seems to have sunk low. Also when spinning the lumbar wheel after few clicks it slips back to normal height with a clunk.

I have found some screws and nuts fallen under my seat. Which part of the seat may be affected according to these symptoms?
August 25, 2015
  Followup from the Pelican Staff: There could be a bushing that failed or one of the rails or levers fell apart. You will have to inspect it to be sure. - Nick at Pelican Parts  
Mike Comments: Where can I get someone to install front seat for a clk320 near Duncanville texas
June 27, 2015
  Followup from the Pelican Staff: Not sure. Call a local Mercedes-benz shop. - Nick at Pelican Parts  
Big Ed Comments: What connector under the passenger seat of a 1998 E320 Mercedes is wired to the seat occupancy sensor and the SRS lamp on the dash?
Thanks
May 20, 2015
  Followup from the Pelican Staff: Should be the yellow connectors. - Nick at Pelican Parts  
Tom Comments: Tom Comments: Hello:
Front Power Seat Repair instructions:
"Start by moving your seat as far forward as it will go"
...
My front seat is not working and while I very much appreciate your articles, if I could move it, I wouldn't be removing it to repair it please.

And, yes, I agree, the seats certainly needs to be moved forward to get at any repair area or replacement parts.

Thank you for expanding on suggestions. Tom

May 12, 2015
Followup from the Pelican Staff: If you seat is stuck and will not move, to access the fasteners, you will have to locate the fore / aft motor and manually activate with fused power and ground. Be sure you are clear of the seat when you try to activate it, this way you aren't hurt. - Nick at Pelican Parts

Hello Nick:
Thank you for the suggestion. I have already applied power and ground directly to all 3 motors and the fore-aft motor appears unresponsive. This is why I was asking how to remove the seat. I have attempted to get my arm around, under and into the area of the motors to use a hex key to release the motor, but there is just not enough room. Incidently, the car is a 01 320 CLK Cabriolet. Please advise. Thanks. Tom
May 14, 2015
  Followup from the Pelican Staff: If the seat will not move when power and ground are applied, your only option is to use a wrench to turn the fasteners. If you don;t have access due to restriction for a rail, remove a motor and manually turn the drive cable. - Nick at Pelican Parts  
Tom Comments: Hello:
Front Power Seat Repair instructions:
"Start by moving your seat as far forward as it will go"
...
My front seat is not working and while I very much appreciate your articles, if I could move it, I wouldn't be removing it to repair it please.

And, yes, I agree, the seats certainly needs to be moved forward to get at any repair area or replacement parts.

Thank you for expanding on suggestions. Tom
May 12, 2015
  Followup from the Pelican Staff: If you seat is stuck and will not move, to access the fasteners, you will have to locate the fore / aft motor and manually activate with fused power and ground. Be sure you are clear of the seat when you try to activate it, this way you aren't hurt. - Nick at Pelican Parts  
thao doan Comments: have a 2003 SLK 320 with a wet floor passenger size- need to remove the foam to dry out or replace. Two questions: 1 do you have instruction to remove the carpet under the seat and 2 do you sell the foam?
March 17, 2015
  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.



Give our parts specialists a call at 1-888-280-7799. They can help you find the right part. - Nick at Pelican Parts
 

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