Few months ago during a heavy rain I was sitting at the traffic lights and I was "front-ended" by a Mercedes C-Klasse, slight incline at the traffic light, I admit I was a bit close to him probably 1-1/2 ft (50cm) but still I would've thought the Merc would have some automatic system to stop it from rolling back
Go figure !
Thankfully no damage whatsoever since it happened at such a slow speed, it was just a slight bump
and I did take my foot of the brake which prevented more damage