Hi m8829,
Sounds like a strange problem to me. It sounds like you are having a voltage drop when applying the brakes. Almost as if it were getting power from the brake source and not the radio source. You should check to see if you have a voltage drop on the changer when your brakes are pressed. A good multimeter and a friend to help you may find the answer quickly without having to go to the dealer. Thank you for using Mercedes Shop Forum.


Cleeve Morrison
La Jolla Audio Repair
www.mercedesradiorepair.net