Paired with the 7 G-Tronic and a not exactly featherlight weight of 1865 kg (4112 lbs) – which, by the way, is more than a CLS 350 Shooting Brake, which has a V6 – you'd be surprised it can reach 100 km/h (62 mph) from a standing start in just 7.8 seconds, onwards to a top speed of 235 km/h (146 mph).
Sure, at higher speeds it struggles a bit and it's pretty far from a sports car, but the takes offs are right up there with a hot hatch from 6-7 years ago.
Motorvision did a 0-100 km/h (62 mph) sprint and filmed it, after which they also tried to reach its top speed. If you're patient enough to wait for the end of the second video, you will see that they actually reached 239 km/h (149 mph), which is obviously a little bit more than the official numbers.
0-100 km/h (62 mph):