NO POWER NO START ON MERCEDES BENZ C CLASS W204

Question by wbb posted 2 days 1 hour ago in Mercedes-Benz

Hi 

  my car MERCEDES BENZ C CLASS W204 2008 won't start. When I put the  key in the ignition nothing happens  no lock unlock , no signal no lights on cluster nothing , car is dead , I tried the second key and nothing, the car is just plain dead. It was working 100% fine before one minute. 

It's not the battery I placed for two month and Tried my battery in other MERCEDES BENZ same model and it worked .

When I say it's dead (no power), 

I have no power to:

-Windows

-Radio

-Climate

-Seats

-etc.

Did a fuse pop? Is some security lock active on the car? What gives? Neither of my keys work. Car doesn't respond to anything, and I can't turn the tkey since there doesnt seem to be power.