Well I took the S420 to lunch the other day. It is definitly slower around town and such. My car is for sure faster at slower speeds. But at high speeds, I think the S might be a bit superior. I once had it up to 125 mph and it was a breeze, rode like a dream. But also like a big sedan, which is not bad though, just different. A powerful feeling, esp with that star soooo far down the hood compared to my C!! Wonderful car.
I drove my mom's Porsche once when they were in Europe, boy I am not very good at a stick. I had only driven someone's 318i stick shift and that was easy. I drove this about a mile or two down the main hwy (PCH) and I stalled it a few times, made a weird smell, a few odd sounds, and decided I should take it home!! I am sure it's wonderful car when driven properly. My mom revs it to 65 mph in 2nd year, she drives crazy in that thing. I don't car for Porsches much though.... It is a silver 911 Carrera.
2006 E350 w/ 155k miles (Daily Driver)
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)