I'm thinking of buying a C63 but cannot handle the 10 mpg Car&Driver recorded on their 700 miles in the car. R&T got 15 mph but I really want to know what owners get in the real world. Any input from a C63 or E63 owner would be greatly appreciated. Thank you!

 

I get 13 to 14 L /100kM, that is around 17-18MPG I believe. I travel 35km to and from work per day and most of this is easy traffic.

 

I average 18.5 mpg over a mixture of roads. Best I ever saw was a 150miles run at 70mph and a light foot - 26mpg.

When running in and therefore cautious I got 21.5 - much to the chagrin of a friend with new M3 @20.5 average. But, since being let off the runin leash, 18.5 is more appropriate