I am more interested in the advice received from the Gendarmes.
I have had a number of conversations with my local flics but never advised such an action.
And why oh why an MB?
Yup. A grown up’s RS3! Which is actually its downfall if you are a speed freak - as it is so quiet yet ready to take you beyond the limit without a thought!
Having been zapped by the same Moto chappies three times in two weeks at a few km under the mandatory ‘losing licence’ limit 
Yea - not something I should shout about, but the MB has the easiest speed limiter to use - the controls are all under ones thumb on the steering wheel (I’d keep the R, but to activate the limiter, is a press with the left thumb, two presses with the right thumb and another with the left thumb - and this before the speed is adjusted. It just got too boring)
I do not like it at all, so its going up for sale when I find a good c2000 SL - the last of the solid MBs. And with the speed limiter on a stalk at finger touch…