Congrats Porker ! 

I had a similar one before my current C63s and it was the most reliable car I ever owned and a lot of fun (didn't like the gearbox too much). The engine is a blast, way better than the  turbo  charged 4l (and fuel consumption is pretty similar).  However, the oil cooler has been an issue for me and others C63PP owners. When driven on a track or the autobahn in summer the temperature may exeed 130C (I think) and the car will switch into emergency mode, making it almost a 2CV. 

As far as I can remember, there have been two fixes; nr 1: install the oil cooler from the Black Series and nr 2: change the mounting/angle of the existing oil cooler. The latter was the standard fix AMG provided and I had it done to my car with some success. Just wanted to let you know. You'll find some more info in the official AMG forum.

Cheers