E 55 AMG Wagon (211.276) V8-5.5L SC (113.990) (2006)
General Module: All Technical Service Bulletins
Electrical - Steering Wheel Buttons Non-Functional
Date: March 8, 2007
Order No.: P-B-46.10/27a
Supersedes: P-B-46.10/27 dated August 30, 2005
Remedy Note Added and Part Number Updated
Model 171.454/456/473, All Model Years
with code 805
Multifunction Steering Wheel Buttons Non Functional
If you receive customer reports in the above model vehicles of non functional Multifunction Steering Wheel Buttons and one or both of the following
fault codes are stored in the memory of the Steering Column Module (SCM), the Local Interconnect Network (LIN) transceiver in the SCM may have
been damaged due to Electro Static Discharge (ESD). Follow the procedure below to replace the SCM with a version with improved ESD protection.
DTC 9325 - [Fault in communication with component Multifunction steering wheel]
DTC 9340 - [The signal line of component Multifunction steering wheel has Short circuit or the component is defective]
For vehicles with SRS complaints, please refer to STAR TekInfo documents within Group No. 91.60 referencing SRS. Changing the SCM
contact does not provide a remedy to the LIN transceiver being damaged due to Electro Static Discharge (ESD).
Using STAR Diagnosis, verify that the above fault codes are stored in the fault memory of the SCM, by navigating to the following menu Control
Units --> Information and Communication --> SCM --> Fault codes.
Remove and replace the SCM as per the following WIS documents:
Follow the initial start-up procedure as required by STAR Diagnosis by navigating to the menu Control Units --> Information and Communication
--> SCM --> Initial start-up.
The following allowable labor operations should be used when submitting a warranty claim for this repair