Hello!
I bought a c180 2010 model in July 2010. From day 1, I had a problem with the car radio/navigator: after 30 minutes of continuous operation, the radio stops operating and the display turns off. If I press the "ON" button, radio restarts but the screen is black. I must stop the car for 2-3 hours in order for the system to operate normally again and then the problem reappears after 30 min. approx.
I have visited the MB Service 5 (five!) times so far and they could not diagnose the problem!

Any ideas?

Thanks a lot!