Winter testing is now over and with automakers heading to the Nurburgring to fine-tune their upcoming new rides, Mercedes has been caught putting the C63 through its paces. These latest spy shots reveal the hi-po sedan with the most minimal camo yet. For the first time, we get to check out the little trunk-mounted spoiler, and it's more clear than ever just how powerful and muscular the wider body and lowered suspension will make the C63 look.

The same 4.0-liter twin-turbo V8 that will power the upcoming AMG GT sits under the hood delivering at least 450 hp and over 500 horses with the performance package. Despite the new powerplant, Mercedes has no plans to change the "valuable" C63 name. The C63 AMG is set to be unveiled at the Paris Motor Show in October.