I have a low tech solution to the end stop as I go forward into my garage, I have a plastic golf practice ball suspended from the ceiling at number plate height with a flag at eye level, when the flag moves I've hit the ball and stop. I tried an ip camera to help with getting in the tight door but there was too much lag so no good . This A3 is a little narrower than my old VW Jetta so I'm ok at the minute. I like the high tech gadgets though so always on the look out, fancy a reversing camera and have seen one that replaces the boot handle. Anyone fitted one of these.