Just as an amusing aside. A quick excel sheet show that if these cars were racing side by side, by the 7 second mark the E63 would be roughly 70meters ahead 
Just goes to show how important getting the start right in a drag race is and why running from a roll like in the M5board vids is so much more fun to see.
Time(s) Distance between cars (m)
0 0
1 8.6
2 17.9
3 27.9
4 38.5
5 49.6
6 61.5
7 74
(note as the data supplied is quite sparse the results have quite large margins of error but you can get the general idea
)

Just goes to show how important getting the start right in a drag race is and why running from a roll like in the M5board vids is so much more fun to see.
Time(s) Distance between cars (m)
0 0
1 8.6
2 17.9
3 27.9
4 38.5
5 49.6
6 61.5
7 74
(note as the data supplied is quite sparse the results have quite large margins of error but you can get the general idea

Here are the test results from Autozeitung:
BMW M5 Mercedes E 63 AMG S 4matic
Weight: 1985 kg 1985 kg
0-40 kph: 1,7 s 1,3 s
0-60 kph: 2,5 s 1,9 s
0-80 kph: 3,3 s 2,7 s
0-100 kph: 4,2 s 3,6 s
0-120 kph: 5,3 s 4,7 s
0-140 kph: 6,6 s 6,0 s
0-160 kph: 8,0 s 7,6 s
NO 0-200 kph time
Handling course: 1.42,3 min 1.42,7 min
Slalom 18m: 66,8 kph 65,8 kph
Braking 100-0 kph: 33,6 m 33,3 m