I suppose I should have clarified it earlier: in Germany, the performance pack with power upgrade is called Performance Pack Plus.
My local dealer already has a white C63 with Performance Pack Plus AND driver's package in stock, the car also has the limited slip differential. Interesting combo because so far, I found only cars with PPP but without the driver's package and LSD. Or cars with LSD but without the PPP and driver's package and so on.
Thanks for the hint with the UK ordering but I'm afraid I'm not buying the car, I usually go for a lease. From my past experience, buying cars valued over 50000 EUR is usually a loss situation because I never drive them longer than 3-4 years and the depreciation in this price range is HUGE over the first couple of years of ownership.
All ECU upgrades void the warranty and since Mercedes Germany is using telemetric diagnostics, it is a no go for me. Each time the car is at the dealer for service, the ECU is connected directly to Mercedes Benz central to look up possible software updates, check for issues, errors, etc. The warranty would be voided in a second, it already happened to one of my customers with his SL55 AMG. Of course you still have the possibility to go to court and sue Mercedes if they don't want to pay for a repair during the warranty period but it is a painful and tiresome process, not worth it for additional 20-30 horses.
According to a Mercedes Benz testdriver (my local dealership happens to be testdriving "central" for Mercedes Benz Germany, all mules are registered to this FACTORY dealership), the only thing really worth using on the C63 is a new exhaust system with high flow 200 cell catalytic converters. This alone, if designed properly, provides around 15-20 horses on the PPP cars without any further mods. Unfortunately he also told me that the exhaust note changes to a higher pitch by doing that, so I'm not quite fond of it.
I'm still not sure if I'm going to get the C63, I really like this car (high performance and fun for "little" money) but my wife wants (and actually needs because of the kids) the X6 M, so I guess the final decision is hers.
Right now, as of today but it can change tomorrow when I get the "final" deal offers, our wish list looks like this:
1. getting rid of my wife's M3 Cab DKG, getting rid of the Cayenne Turbo S (pre-facelift) and getting a brandnew X6 M
2. getting a 991 Carrera ("S" maybe) Cabriolet in 18 months after my 997 Turbo lease runs out
This would actually be our favorite combo because it would allow us to include a 911 AND a Cab again into our daily life.
If I get the C63 PPP now, I'm not sure the next car in 18 months is going to be a Porsche anymore and this would be really a problem for me since I invested so much time in creating some sort of "relationship" to this brand.
Thanks again for all your inputs and thoughts, I really appreciate it.
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RC (Germany) - Rennteam Editor 997 Turbo, Cayenne Turbo S, BMW M3 Cab DKG, Mini Cooper S JCW