Question about 2007 Mercedes-Benz ML320 CDI

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I went and changed my battery and now my radio is not working. When I tried to reset it, it asked for the five digit security code which I don't have. How can obtain a security code?

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  • johnny mcneely Aug 26, 2010

    you'll need to go to a mercedes dealer for the code, sorry. but i hope this helps!!!

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Something similar happened to mine. The battery died and the audio controls no longer worked (on the steering wheel) and the radio stayed on when the car was turned off. I had to pull the fuse and reseat it and that seems to have fixed it. It wasn't loose or blown.

Posted on Apr 08, 2012

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That is a factory rest problem. the dealer has a key code to rest it.

Posted on Aug 26, 2010

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