I recently bought a 2012 C300 Sport. I knew the GPS and time wasn't working. I tried to mess around with the settings for awhile, but nothing worked. I looked at the antenna on the top of the car, and it was not well secured. I was able to pull it straight off, and it was damaged. I ordered a new antenna, but only a cover came for visual purposes. I need a new antenna that has the circuit boards in it. I looked around for awhile and couldn't find anything. Has anybody else had to buy a new antenna? How much would it cost to have a Mercedes dealership fix it?

 

I just bought one of those online. The shark antenna has 3 wires soldered into the circuit board that connect to the radio, satellite radio, and gps. My issue is those 3 wires are about 3 feet long and I don't know how to drop the headliner in the back seat to snake those. they have easy snap connectors at the ends, but no idea where they connect.

 

I believe you have to take the light in the headliner out to get to the wires. I'm not sure how to get it off, but I bet you could figure it out.