It isn't a supercar, but this forum is the closest match.

There is one at my local dealer already marked down nearly $8K.

I am sure I could get another 2K off.

Would I be a fool to trade my C63 in on it?

 

I think it would be a downgrade.

 

m56 actually is very very nice car if you plan to keep the car long then i say do it..

 

How so??? Besides the performance upgrades of the C63 trim, the C class is , in essence, an entry level compact sedan. Whereas the M56 is a full sized sedan. Both fall into the luxury category. Not to mention, the quality of the interior of the C class leaves a lot to be desired. Not knocking the C63, as it's a great car, but your comment makes no sense.