Mercedes-Benz E550 4MATIC Problem Report
Mercedes-Benz E550 4MATIC Failed Gateway Module May Cause Lack of Audio/Cell Phone Functionality
Lack of audio or cell phone functionality may be related to the failure of the audio gateway module.
Audio (Radio, Phone, CD) intermittently goes silent. All software updated on auto and still recurs. Dealership says it needs input from Mercedes and that is where it stands. I am going to suggest that it try to replace gateway module based on these reports. ROW - ROW