Spies at KGP Photography have caught a hidden Mercedes vehicle at the AMG factory. Unfortunately, after a 12 hours stake out, the spies were unable to get uncovered shots of the vehicle since AMG engineers were just preparing the car for testing.

Speculations include that this is the Mercedes SLC, a car that Mercedes is building in partnership with HWA AG, its official DTM race car developer. The SLC will be powered by a 6.2 liter AMG V8 engine producing 500 horsepower. Other speculation is that this is the long-rumored Maybach Coupe.

Head over to WindingRoad for the full shots