mercedesbenz Workshop Repair Guides

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Head Restraint Control Module: All Technical Service Bulletins
Interior - Creaking Noise From Seat Head Restraints

Noises from head restraint CAK

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

Work units

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