Hi guys. I've got an automatic 2008 c220 cdi (w204) and it has stopped working today. I unlocked my car and got in and put the key in and turned in and there was no power going through at all. The dash lighting didn't even light up apart from the mileage which is always displayed. The headlights don't work etc but the cd player does work so I'm confused. When I unlock the car and turn the key, the only thing that happens is that the car makes a low beeping sound for a few seconds and that's it. Does any1 know what the problem could be?