Failed Gateway Module May Cause Lack of Audio/Cell Phone Functionality on Mercedes-Benz E550

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

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Average mileage: 28,666 (3,500–53,000)
6 model years affected: 2007, 2008, 2009, 2010, more2012, 2014
11 people reported this problem
7 people shared problem details
My 2012 E550 4Matic all the sudden today when started has NO Sound from AnY Sources and shows "Not Available" on Each Sat/Aux/BluTooth but still shows AM/FM Stations and Info Just Zero "0" Sound and was fine just last night . Very irritating I've already checked ALL fuses in trunk and under hood..
repeated failure of audo/tlephone console not fixed after 3 attempts and 6 days in shop
Satalite radio stopped working. Cat has a jerk sometimes whet changing gears.
about twice a week sound when car is turned on doesn't work after about 15 minutes it just pops on
Blue tooth.won't connect
The screen for the audio electronics says DEVICE UNAVAILABLE, and none of the audio electronics will work. This can happen at anytime, when you are just starting up or driving down the road. I have recorded this on my cellphone and showed it to the Mercedes service department and they simply said they could not duplicate the issue.
intermittent audio failure; dealer claims it needs MB input to figure out cause and enable warranty repair

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