Mercedes Benz S 550 4MATIC Technical Problem #LI91-30_P-048290 Date: 091110
Interior - Grind Noise In Backrest (Multicontour Seat)
NOISE FROM ACTIVE MULTICONTOUR BACKREST WITH SEAT VENTILATION SWITCHED ON
Topic number LI91.30-P-048290
Version 1
Design group 91.30 Seat heater, seat ventilation
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968) Page 175
Date 11-10-2009
Validity Model series 221 as of model refinement package with seat ventilation (401) and DS (432) up to production date 22.09.2009
Reason for change
Reason for block
Complaint:
Grinding noises can occur in the backrest on active multicontour seats with the backrest under load and the seat ventilation switched on.
Cause:
When a person sits on the seat, the yellow pneumatic line can slip over the bracket of the control unit for the active multicontour seat and then scrape
against the fan of the backrest.
Remedy:
Attach a cable tie to the bracket of the multicontour backrest and fix the three pneumatic lines (yellow, red, clear) in place as shown in the
illustration in the attachment (Pic_1).
Attachments
Symptoms
Validity
Attachment - Positioning of cable tie
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968) Page 176
Interior - Grind Noise In Backrest (Multicontour Seat)
NOISE FROM ACTIVE MULTICONTOUR BACKREST WITH SEAT VENTILATION SWITCHED ON
Topic number LI91.30-P-048290
Version 1
Design group 91.30 Seat heater, seat ventilation
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968) Page 175
Date 11-10-2009
Validity Model series 221 as of model refinement package with seat ventilation (401) and DS (432) up to production date 22.09.2009
Reason for change
Reason for block
Complaint:
Grinding noises can occur in the backrest on active multicontour seats with the backrest under load and the seat ventilation switched on.
Cause:
When a person sits on the seat, the yellow pneumatic line can slip over the bracket of the control unit for the active multicontour seat and then scrape
against the fan of the backrest.
Remedy:
Attach a cable tie to the bracket of the multicontour backrest and fix the three pneumatic lines (yellow, red, clear) in place as shown in the
illustration in the attachment (Pic_1).
Attachments
Symptoms
Validity
Attachment - Positioning of cable tie
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968) Page 176
