Model MB E430 1999. I have not changed a battery or done any electrical work on car for 1 year. Recently the radio, when turned on goes to the station then "CODE ?" appearson the radio, the after 15 seconds or so it goes to the previous station and the operation repeats. If I enter the code the radio works perfectly until I turn it off. Then the same problem appears. I would quess a floating short. Any Ideas. This is my first post

Hi techno9034,

I might suggest that you check the connections in the back of the radio. You should have a Battery hot line 12volts all the time and then a Keyed 12volts line from the ignition. If your Battery line voltage is missing or a fuse blown on that line then the problem you have would make sence. Check for the two powers and let me know.

Cleeve Morrison
La Jolla Audio Repair
www.lajollaaudiorepair.com