iBeech, the centre screen is showing fuel consumption - it's one of the Efficient Dynamics displays.
I hadn't thought about the curve affecting the speed - good point. But although it might help the acceleration times, the top speed is still going to be limited by the electronics. You can fool it for very short periods - if you're at the top speed and come over a small rise, the extra bit of power will get you up over the limited speed. But then you'll feel the engine throttle back and it'll slow back down.
It seems a bit unnecessary to me - like you say, wolz, it's not going to go much faster anyway. And the last M-B I drove wasn't limited, and was able to go faster than my old 1-series, despite having less power.
Anyway, the video was a bit of fun to make, and I figure it's interesting for those of you, living in countries where you can't do this on the roads.