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Pelican Technical Article:

Front Power Seats Removal

Kerry Jonsson

Time:

3 hours3 hrs

Tab:

$1500

Talent:

***

Tools:

T10 inverted Torx socket with ratchet and extensions

Applicable Models:

Mercedes-Benz W211 (2003-09)

Parts Required:

Front power seat

Hot Tip:

If possible lift up the seat as far as possible to gain access to fasteners

Performance Gain:

Remove seat to replace upholstery

Complementary Modification:

Remove B Pillar cover to replace seat belt if necessary

If your front power seats are not functioning properly or you have an airbag code with a seat occupancy detection code, you will need to remove the passenger seat from the car. Also if you have to service components underneath the seat, you will have to remove them. One of the components you may need access to is the power seat module. These modules have been known to stay awake and drawing current even when the car is shut off. This will drain the battery and cause a "no-start" condition. If you have to change the seat belt buckle that is mounted under the B pillar cover, you will need to remove the seat belt attachment on the right and left front seats. Also these seats are dynamic seats. They have lumbar support, heating and cooling built into the seat. These components can also be serviced once the seat is removed. In this tech article we will go over the steps to remove the front power seats.

The procedure to remove the right side front seat is the same as the left side front seat. We have illustrated the right side seat being removed. Follow the same steps as if you are removing the left side seat with the only difference being you are working on the other side of the car.

ThisPicture illustrates the front of the passenger side seat on the left side of the seat.
Figure 1

ThisPicture illustrates the front of the passenger side seat on the left side of the seat. If possible adjust the seat all the way back and the front of the seat all the way up to gain access to the fasteners you have to remove. Otherwise you have to reach underneath the seat and use a flat E10 wrench which is more time consuming. Remove the E10 external Torx fastener (green arrow).

ThisPicture illustrates the front of the passenger side seat on the right side of the seat.
Figure 2

ThisPicture illustrates the front of the passenger side seat on the right side of the seat. Remove the E10 external Torx fastener (green arrow). If you cannot adjust the right seat all the way backwards and the front of the seat upward, you will have to reach underneath the seat and use a flat E10 wrench, which is more time consuming.

ThisPicture illustrates the back of the front right side seat with the seat adjusted all the way forward.
Figure 3

ThisPicture illustrates the back of the front right side seat with the seat adjusted all the way forward. Remove the two E10 external Torx fasteners (green arrows). If you cannot adjust the right seat forward, you will have to reach underneath the seat and use a flat E10 wrench which is more time consuming.

Tilt the seat back as far as possible to expose underneath the front of the seat.
Figure 4

Tilt the seat back as far as possible to expose underneath the front of the seat. Pull the wiring securing tab out of the mounting hole (red arrow).

Unplug the large electrical connector on the power seat control module by squeezing the locking tabs on each side of the electrical connector and pulling it away from the power seat control module.
Figure 5

Unplug the large electrical connector on the power seat control module by squeezing the locking tabs on each side of the electrical connector and pulling it away from the power seat control module.

Unplug the small electrical connector on the power seat control module by pushing the locking tab on the right side of the electrical connector and pulling it away from the power seat control module.
Figure 6

Unplug the small electrical connector on the power seat control module by pushing the locking tab on the right side of the electrical connector and pulling it away from the power seat control module.

Unplug the airbag seat occupancy sensor connector by squeezing the two locking tabs (green arrows) and pulling the connector away from the seat assembly.
Figure 7

Unplug the airbag seat occupancy sensor connector by squeezing the two locking tabs (green arrows) and pulling the connector away from the seat assembly.

Disconnect the air line for the lumbar adjustment by grabbing each side of the air line connector and pulling them apart.
Figure 8

Disconnect the air line for the lumbar adjustment by grabbing each side of the air line connector and pulling them apart.

Unplug the final connector on the left side of the seat by squeezing the locking tabs on each side of the electrical connector and pulling it away from the power seat assembly.
Figure 9

Unplug the final connector on the left side of the seat by squeezing the locking tabs on each side of the electrical connector and pulling it away from the power seat assembly.

Remember the position of the wiring as you remove it from the power seat assembly.
Figure 10

Remember the position of the wiring as you remove it from the power seat assembly. This is very important when you return the harness to the same location it was in. You do not want the wiring harness to rub or get caught on the linkage while the seat is adjusted back and forth. This can damage the wiring harness and electrical connectors.

Remove the seat belt cover from the power seat assembly by pulling it away until it unclips from the plastic power seat side cover.
Figure 11

Remove the seat belt cover from the power seat assembly by pulling it away until it unclips from the plastic power seat side cover.

Remove the T40 Torx fastener for the seat belt attachment to the seat.
Figure 12

Remove the T40 Torx fastener for the seat belt attachment to the seat.

Tilt the power seat assembly bottom out of the door opening.
Figure 13

Tilt the power seat assembly bottom out of the door opening. Be careful not to scratch the glove box area (red arrow) with the power seat linkages. You may want to put a towel around the bracket or have an assistant help you pull the seat out of the car. Installation is the reverse of the removal steps. Fit the seat inside the car and attach the seat belt then tighten the fastener. Fit the seat belt mounting bolt cover into the power seat assembly side cover. Carefully route the wiring harness through the center of the power seat assembly and install the securing tab in the hole at the front of the seat. Do not use plastic tie wraps to secure the wiring to the brackets as they may be put under stress when the seat is adjusted all the way backwards and forwards. Attach the four electrical connectors and the single air line to the connections on the power seat assembly. Tilt the power seat assembly forward and line up the mounting holes on the body of the car with the mounting holes on the power seat assembly. Tighten the two fasteners at the rear of the seat then turn on the ignition key and move the seat all the way back and up. Install and tighten the two fasteners at the front of the power seat assembly and you are done.

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Comments and Suggestions:
On Comments: On my passenger side seat, only one side is moving. Is there 2 motors to the seat for moving forward and backwards.

Moving forward and backwards is not working
August 6, 2016
  Followup from the Pelican Staff: No, there should be one motor for fore and aft movement. - Nick at Pelican Parts  
concrete Comments: mb 2005 E-320 sedan gas SRS light on. Had diagnosed - need to replace passenger seat LR restraint system sensor. Is sensor embedded in foam padding or just unplug and reinsert new one? Help
July 25, 2016
  Followup from the Pelican Staff: if it is the seat occupancy sensor, it has to be replaced via seat disassembly. - Nick at Pelican Parts  
AMG Comments: Where is the engine for raising & lowering the seat?
everything works except Raise/Lowering my experience is the engine get stuck as we rarely use lower/raising on the driver side by tapping the engine is usually fix it as everything else works..

Hold the Raise / Lower button while tapping the engine but I cant see it?
October 30, 2015
  Followup from the Pelican Staff: I would assume the motor is attached to the seat rails. - Nick at Pelican Parts  
Al Comments: My passenger seat look like new, as no one is using it on a daily basis. My driver's seat is used as car is 10 years old. Is it feasible to swap seats, move passenger's seat to driver's and vice versa? This was they would look equally used over the next 10 years!
July 10, 2015
  Followup from the Pelican Staff: No, I don't think so. The controls would hit the center console. - Nick at Pelican Parts  

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