Mercedes Benz Truck R 320 BLUETEC Technical LI91-10_P-048505 Date: 100324 Interior - Front Seat Noises When Adj. Lumbar Support

Mercedes Benz Truck R 320 BLUETEC Technical LI91-10_P-048505 Date: 100324
Interior - Front Seat Noises When Adj. Lumbar Support
Noises during lumbar support adjustment
Topic number LI91.10-P-048505
Version 1
Design group 91.10 Front seats
Date 03-24-2010
Validity Model series 164/251 for all vehicles with manually adjustable lumbar support
Reason for change WIS reference
Reason for block
Complaint:
Noises can occur when the manually adjustable lumbar support is adjusted.
Cause:
The Bowden cable of the manually adjustable lumbar support can rub against the spring core of the backrest.
Remedy:
Mercedes Benz Truck R 320 BLUETEC
Page 433
1. Remove seat-back lining (164: AR 91.10.-P-1915 GZ/251: AR 91.10-P-1915RT)
2. Manually adjust the lumbar support with a load on the seat and determine the friction points.
Note:
There must be a person seated on the affected seat when determining the friction points so that there is adequate pressure on the backrest. The
attached picture shows the routing of the Bowden cable for the manually adjustable lumbar support and potential points of friction with the spring
core of the backrest.
3. Glue felt onto the friction point on the spring core of the backrest.
Attachments
Symptoms
Parts
Work units
WIS-References
Mercedes Benz Truck R 320 BLUETEC
Page 434
Validity
Attachment - Routing of Bowden cable for manually adjusted lumbar support in backrest. The red arrows show potential points of friction between
the Bowden cable and the spring core of the backrest.