Failed Gateway Module May Cause Lack of Audio/Cell Phone Functionality on Mercedes-Benz E320 4MATIC

Problem Description and Possible Solution

Lack of audio or cell phone functionality may be related to the failure of the audio gateway module.

Problem Data
RepairPal Verified
Average mileage: 117,000 (117,000–117,000)
3 model years affected: 2003, 2004, 2005
4 people reported this problem
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The radio wouldn't come and I took it to the dealer and the replaced the Tell-Aid module, and ever since
the cruise control segment ring goes counter clockwise, and before the replacement it went clockwise, and
the tell me thats normal. goes from 160 to set speed.