As far as trap speed is concerned, well, AMS did not measure the trap speed at the 400 meter mark so we do not know which car is pulling the hardest. What is interesting is the quickest car to 200 km/h (124 miles per hour) is the E63 AMG S with a 12.2 to the 12.3 run by the BMW and Audi.
The heaviest car is the RS7 at 4424 pounds followed by the E63 AMG S at 4356 pounds and the F10 M5 coming in the lightest (although hardly light) at 4204 pounds. These weights are lower than their USA counterparts likely due to the seats used which do not pass crash test standard in the USA.
Data panel below.