Wednesday, April 24, 2019

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI91-10_P-048505 Date: 100324

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # 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:



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



2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 276



Parts



Work units



WIS-References



2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 277



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.

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