SL 55 AMG (230.474) V8-5.5L SC (113.992) (2003)
Seat Back Frame: Customer Interest
Interior - Seat Back Cracking Noises
Date: March 24, 2009
Order No.: P-B-91.10/84a
Supersedes: P-B-91.10/84 dated January 26, 2005
Group: 91
Revision History
Revision
Date
Purpose
a
3/24/09
Damage Code Revised
-
1/26/05
Initial issue
SUBJECT:
Model 230.474/475, with Code 404 and 405 (Multi-Contour Backrest), up to VIN F032754
Seat Backrest Cracking Noise
If you receive customer reports in the above model vehicles of a cracking noise from the multi-contour seat backrest when in stop and go traffic or when
cornering, this may be due to the rivet used to fasten the cross struts in place. To resolve, perform the below procedure.
1. Remove seat backrest cover. Refer to WIS document AR91.10-P-1910R.
2. Detach backrest seat cover to gain access to the rivets for the cross struts (Figure 1, Pos. 2).
3. Drill out the 8 rivet heads for the cross struts (Figure 1, Pos. 2) for multi-contour backrest control unit taking care not to damage the backrest frame.
4. Knock rivet ends into backrest using a pin punch. On the tunnel side the rivet ends fall into the interior, remove these rivet ends. On the door side, the
rivet ends remain in the backrest, spray wax into the area where the rivet ends fall to prevent the rivet ends from rattling.
5. Fasten the cross struts with steel rivets, part number below.
6. Reattach backrest seat cover.
7. Reinstall backrest cover. Refer to WIS document AR91.10-P-1910R.
Parts Information