Front Seat - Multicontour Seat
Electronic Components Assembly Overview
1 Memory seat/steering column adjustment control head (J136)
• Vehicles with left front seat ventilation control module (J800) (seat heating function integrated)
• Front passenger side front passenger memory seat control module (J521)
• Front passenger side vehicle version with Right front seat ventilation control module (J799) (seat heating function integrated)
• Assembly Overview, refer to => [ Memory Seat/Steering Column Adjustment Control Module Assembly Overview ] Memory Seat/Steering Column Adjustment Control Module Assembly Overview
• Removing and Installing, refer to => [ Memory Seat/Steering Column Adjustment Control Module J136/J521 ] Memory Seat/Steering Column Adjustment Control Module J136/J521
2 Driver seat position sensor (G553)
• Front passenger side front passenger seat position sensor (G554)
• Assembly Overview, refer to => [ Seat Position Sensor ] Description and Operation
• Versions with Seat Occupied Sensor for Belt Fastening Detection, Removing and Installing, refer to=> [ Driver Seat Position Sensor and Front Passenger Seat Position Sensor G553/G554, Vehicles with Seat Occupied Sensor for Belt Fastening Detection ] Driver and Front Passenger Seat Position Sensor G553/G554, Vehicles with Seat Occupied Sensor
• Versions with Seat Occupied Sensor for Passenger Airbag Deactivation, Removing and Installing => [ Seat Position Sensor G553/G554, with Seat Occupied Sensor for Passenger Airbag Deactivation ] Seat Position Sensor G553/G554, with Seat Occupied Sensor for Passenger Airbag Deactivation
3 Driver seat depth adjustment motor (V256)
• Front passenger side front passenger seat depth adjustment motor (V257)
• Assembly Overview, refer to => [ Seat Depth Adjuster Assembly Overview ] Seat Depth Adjuster Assembly Overview
• Removing and Installing, refer to => [ Depth Adjustment Motor V256/V257 ] Depth Adjustment Motor V256/V257
4 Driver seat cushion fan (V390)
• Front passenger side front passenger seat cushion blower fan (V391)
• If equipped
• Assembly Overview, refer to => [ Seat Cushion Fan Assembly Overview ] Seat Cushion Fan Assembly Overview
• Removing and Installing, refer to => [ Seat Cushion Blower Fan V390/V391 ] Seat Cushion Blower Fan V390/V391
5 Driver seat heating element (Z6) / driver backrest heating element (Z7) / driver seat bolster heater (Z31) / driver seat backrest bolster heater (Z32)
• Front passenger side front passenger seat heating element (Z8) / front passenger backrest heating element (Z9) / front passenger seat bolster (Z33) / front passenger seat backrest bolster (Z34)
• If equipped
• Heating Element, Removing and Installing, refer to => [ Bolster Heater Z31/Z33 for Multi-contour Seat ] Bolster Heater Z31/Z33 for Multi-contour Seat and=> [ Backrest Bolster Heater Z32/Z34 for Standard Seat ] Backrest Bolster Heater Z32/Z34 for Standard Seat
6 Driver seat backrest blower fan (V388)
• Front passenger side front passenger seat backrest blower fan (V389)
• Removing and Installing, refer to => [ Backrest Blower Fan V388/V389 ] Backrest Blower Fan V388/V389
7 Driver backrest adjustment motor (V45)
• Front passenger side front passenger backrest adjustment motor (V46)
• Assembly Overview, refer to => [ Backrest Adjustment Motor Assembly Overview ] Backrest Adjustment Motor Assembly Overview
• Removing and Installing, refer to => [ Backrest Adjustment Motor V45/V46 ] Backrest Adjustment Motor V45/V46
8 Valve block 1 in the driver seat (N475)
• for massage mat
• Front passenger side valve block 1 in front passenger seat (N477)
• If equipped
• Assembly Overview, refer to => [ Backrest Cushion with Massage Mat Assembly Overview ] Backrest Cushion with Massage Mat Assembly Overview
• Removing and Installing, refer to => [ Valve Blocks N475/N476/N477/N478 for Massage Mat ] Valve Blocks N475/N476/N477/N478 for Massage Mat
9 Driver headrest adjustment motor (V103)
• Front passenger side front passenger head restraint adjustment motor (V104)
• Assembly Overview, refer to => [ Headrest and Backrest Adjustment Assembly Overview ] Headrest and Backrest Adjustment Assembly Overview
• Removing and Installing, refer to => [ Headrest Adjustment Motor V103/V104 ] Headrest Adjustment Motor V103/V104
10 Driver side upper backrest adjustment motor (V258)
• Front passenger side front passenger upper backrest adjustment motor (V259)
• Assembly Overview, refer to => [ Headrest and Backrest Adjustment Assembly Overview ] Headrest and Backrest Adjustment Assembly Overview
• Removing and Installing, refer to => [ Headrest Frame ] Headrest Frame
11 Driver side multicontour seat control module (J873)
• Front passenger side right front multicontour seat control module (J872)
• The connection for the restrictor is deleted on the Original Replacement Part with an integrated check valve and the separate check value must be removed. Refer to the => Parts Catalog
• Removing and Installing, refer to => [ Multi-Contour Seat Control Modules J873/J872 ] Multi-Contour Seat Control Modules J873/J872
12 Front side airbag with driver thorax airbag igniter (N199)
• Front side airbag on the passenger side with front passenger thorax airbag igniter (N200)
Follow all safety precautions when working on pyrotechnic components. Refer to => [ Restraint System Components, Safety Precautions and Testing Procedures ] Description and Operation.
• Assembly Overview, refer to => [ Front Side Airbag ] Front Side Airbag
• Removing and Installing, refer to => [ Front Thorax Airbag Igniter N199/N200 ] Front Thorax Airbag Igniter N199/N200
13 Valve block 2 in the driver seat (N476)
• for massage mat
• Front passenger side valve block 2 in front passenger seat (N478)
• If equipped
• Assembly Overview, refer to => [ Backrest Cushion with Massage Mat Assembly Overview ] Backrest Cushion with Massage Mat Assembly Overview
• Removing and Installing, refer to => [ Valve Blocks N475/N476/N477/N478 for Massage Mat ] Valve Blocks N475/N476/N477/N478 for Massage Mat
14 Front passenger seat occupied sensor (G128)
• Vehicles with front passenger seat only
• Removing and Installing, refer to => [ Front Passenger's Seat Occupied Sensor G128 ] Front Passenger's Seat Occupied Sensor G128
15 Left Rear Footwell Illumination Bulb (L106)
• Right rear footwell illumination bulb (L107)
• If equipped
16 Driver side massage function button (E670)
• Front passenger side front passenger side massage function button (E671)
• If equipped
• Removing and Installing, refer to => [ Massage Function Buttons E670/E671 ] Massage Function Buttons E670/E671
17 Driver seat switch module (E663)
• Front passenger side front passenger seat switch module (E664)
• Assembly Overview, refer to => [ Seat Adjustment Control Head/Switch Module Operation Assembly Overview ] Seat Adjustment Control Head/Switch Module Operation Assembly Overview
• Removing and Installing, refer to => [ Seat Adjustment Control Head E470/E471/Front Seat Switch Module E663/E664 ] Seat Adjustment Control Head E470/E471/Front Seat Switch Module E663/E664
18 Driver seat height adjustment motor (V245)
• Front passenger side: front passenger seat height adjustment motor (V246)
• Assembly Overview, refer to => [ Seat height adjustment motor assembly overview ] Seat Height Adjustment Motor Assembly Overview
• Removing and Installing, refer to => [ Seat Height Adjustment Motor V245/V246 ] Seat Height Adjustment Motor V245/V246
19 Driver seat switch module 2 (E667)
• Front passenger side front passenger seat switch module 2 (E668)
• Assembly Overview, refer to => [ Seat Adjustment Control Head/Switch Module Operation Assembly Overview ] Seat Adjustment Control Head/Switch Module Operation Assembly Overview
• Removing and Installing, refer to => [ Front Seat Switch Module 2 E667/E668 ] Front Seat Switch Module 2 E667/E668
20 Driver seat angle adjustment motor (V243)
• Front passenger side front passenger seat angle adjustment motor (V244)
• Assembly Overview, refer to => [ Seat Angle Adjustment Motor Assembly Overview ] Seat Angle Adjustment Motor Assembly Overview
• Removing and Installing, refer to => [ Seat Angle Adjustment Motor V243/V244 ] Seat Angle Adjustment Motor V243/V244
21 Driver seat multicontour seat compressor (V439)
• Front passenger side front passenger multicontour seat compressor (V440)
• Assembly Overview, refer to => [ Multicontour Seat Compressor Assembly Overview ] Multicontour Seat Compressor Assembly Overview
• Removing and Installing, refer to => [ Compressor Multicontour Seat Compressors V439/V440 ] Compressor Multicontour Seat Compressors V439/V440
22 Driver seat forward/back adjustment motor (V28)
• Front passenger side front passenger seat forward/back adjustment motor (V31)
• Integrated in the lower seat frame; replace if the lower seat frame is faulty. Refer to => [ Lower Seat Pan Frame ] Lower Seat Pan Frame