Mercedes Benz S 550 4MATIC Technical Problem #LI91-16_P-048507 Date: 100324 Interior - Creaking Noise From Seat Head Restraints

Mercedes Benz S 550 4MATIC  Technical Problem #LI91-16_P-048507 Date: 100324
Interior - Creaking Noise From Seat Head Restraints
Topic number LI91.16-P-048507
Version 1
Design group 91.16 Head restraints
Date 03-24-2010
Validity Model series 203, 211, 219, 221 produced up to Wk 41 (2006)
Reason for change Model designation added / Supersedes DTB S-B-91.10/ 112f
Reason for block
Complaint:
Creaking noise from CAK module in head restraint.
Attachments
Cause:
The plastic housings of the 6 pins in the CAK module are too large. This tolerance results in noises.
Further damage code: 91N31
Remedy:
In the case of vehicles produced since calendar week 41/2006, the shafts of the head restraint are oval in shape. This measure has been implemented
in series production.
Procedure in the case of complaints:
Replace head restraint. Do not replace guide sleeves.
Symptoms
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 338
Work units
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 339
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 340
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 341
Validity
Attachment - Affected area