I find the C63 steering to be precise, similar to the M3, but IMO a little too light. The M3 had better weight. Having said that, I found the M3 a tad too light as well but definitely better than the C63.
2016 M2 | Long Beach Blue | 6MT - current
2015 M4 | Austin Yellow | DCT
2014 Corvette Stingray | Z51 | Torch Red | 7MT
2012 MB C63 Coupe | Performance package | Obsidian Black
2011 E92 M3 | Jerez Black | Fox Red | DCT | Competition Package