Last time we caught the next-generation Mercedes C-Class out for a testing session, it was just starting to lose some of its camouflage. Now, it looks like the strip down continues, as the prototype our spies caught today has less camouflage than ever.

The car was caught while undergoing hot-weather testing and in this stage it was simply too hot to slather the C-Class in heavy camo. Luckily for us, our spy photographers happened to be in the area and they snapped some detailed pictures.

It’s pretty clear that the new C-Class->ke1593 will feature the same design language as the recently launched E-Class->ke373 and S-Class->ke359 models. Under the hood, we expect to see gasoline and diesel engine options, plus a hybrid version - a first for the C-Class.

The new-generation Mercedes C-Class will make its world debut in September at the 2013 Frankfurt Motor Show.

Click past the jump to read more about the new Mercedes C-Class.

Spy shots

The new-generation C-Class will be inspired by the F800 Concept Car displayed in Geneva 3 years ago. Of course, it won't be as quite as in-you-face as the concept; rather, it will evolve in ways similar to the E-Class and the S-Class.

Up front, there will be a larger grille in a 3D design, a revised bumper - seen here for the first time - and a new set of headlights similar to the recently launched S-Class.

The backside will receive some updates too. We expect to see a new set of taillights and a redesigned bumper to help freshen up the aging C-Class.