I have a problem with my car, is a 2002 c200 kompressor,my car is running normaly and sudenly I hear a "beeping" and all the gauges go down, none of the electrical works(windows,turnsignals,the horn etc) the car still running and the fan start to blowing.
Does anybody have an opinion or offer any advice!?

 

Check the battery in your key; that happened to me and it was the key.

 

Any chance your car is leaking water into the interior ?

Igntion switch / key could be culprit.

General failure of power sources. Check main battery, alternator and earth strap on engine.

Check rear fuse box.