Having problems with your 2007 Mercedes-Benz ML320 CDI ?
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?
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.
That is a factory rest problem. the dealer has a key code to rest it.
Repair Help & Product Troubleshooting for 2007 Mercedes-Benz ML320 CDI
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