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Mercedes Benz S 550 4MATIC Technical Problem #LI91-10_P-0472543 Date: 100115 Interior - Various Weight Sensing Seat Issues Complaints concerning right seat adjustment with WSS system

 Mercedes Benz S 550 4MATIC  Technical Problem #LI91-10_P-0472543 Date: 100115
Interior - Various Weight Sensing Seat Issues
Complaints concerning right seat adjustment with WSS system
Topic number LI91.10-P-047254
Version 3
Design group 91.10 Front seats
Date 01-15-2010
Validity Model series 221 with code 494 (USA) up to VIN A258661
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 162
Reason for change A password is needed for SRS control unit in order to complete the retrofit.
Reason for block
Complaint:
In the event of complaints concerning the weight sensing system (WSS) or the right front seat adjuster with WSS which necessitate the replacement
of the seat adjuster, please note the following.
The seat adjuster with integrated WSS sensors (pin system) installed up to model year 09 is no longer available through the parts service.
Only the new generation of WSS system (bladder system) is now available as in model series 216, and conversion is necessary.
Cause:
Conversion to new generation of WSS system.
Remedy:
Check which system is installed in the vehicle: pin system (PIC101) or bladder system (PIC102). The check is necessary only up to VIN A258661!
If the pin system is installed, the seat adjuster must be replaced together with the control unit bracket and the seat cushion parts kit.
The seat cushion parts kit has the sensor system for the WSS system already installed.
Note:
The electrical connections must not be separated!
1. Note before installation: Make sure that the sensor mat is properly clipped in place (PIC103). The electrical lines must not be separated!
2. Fix control unit bracket at the specified points (PIC104).
3. Place foam pad with covering and sensor system on cushion shell and pass the lines through the sine spring (PIC105).
4. Observe routing of lines and fastening points (PIC106 to PIC110).
5. From here on, reassemble and reinstall the seat in the usual way. Note: Observe correct bolt tightening sequence!
6. Perform initial startup of WSS system. (A password will be needed from MBUSA Helpdesk or TAC )
7. If they see the question: "Do you now want to check the fault memory for any current faults?" then press F4 ( = NO)
8. If they see the question: "Continue initial startup despite present fault?" then press F3 ( = YES)
9. Then they have to change the ecu coding via the menu "Special functions" within the SRS main menu.
10. Select the menu "Seat mat type 'Passenger'" and set it to "WSS Bladder Delphi".
11. Start the coding with F3 and follow the instructions.
12. Switch off / on ignition at least once and then erase the fault memory. The SRS lamp should be off now.
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 163
Symptoms
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 164
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 165
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 166
Parts
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 167
Attachments
Work Units
WIS-References
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 168
Validity
Attachments
Bearing of right front seat adjuster with pin system
Bearing of right front seat adjuster with new weight sensing system
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 169
Clip fastening of sensor mat
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 170
Bracket
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 171
Threading the wiring harness
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 172
Wiring harness at side with cable tie
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 173
Wiring harness at cushion shell
Line routing
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 174
Fasting of connector
Fasting of sensor
Labels:
Location: 1700N, Flat Rock, IL 62427, USA

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