To be honest I don't mind telling people,
First problems with communication problems with the dealer
Went in for it's 1000 mile service and came out with a kerbed wheel and they tried putting the blame on me
Water getting in the headlights
ABS / traction warning light coming up
Problems with seat head rest not going down, which caused problems when getting people in the back
The bumpers were completely different colour to the rest of the bodywork, they tried fobbing me off saying its plastic but in this day and age it shouldn't be, they said they will get them resprayed free of charge but I'll loose warranty on the paint work.
It got to the stage with the dealers I had to speak to the CEO / President of Mercedes Benz directly
These are only very few of the problems I have had and in no way would I recommend Mercedes Benz let alone a C63 (Others I can't comment on)
If your really looking at getting one seriously consider looking at BMW or Audi!
Thanks for the info, good luck with the 370z. I've loved mine and will be sorry to see if go.
If they did an M3 touring then I'd be getting one of those, the RS4 looks a bit boring