After an incident with a pheasant which resulted in the purchase of a new o/s headlamp amongst other items, I wasn't really happy with the headlamp height adjustment how the body shop left it. I attacked it with a screwdriver one evening with the car close to a wall, which seemed to have no significant effect, and in any case the self levelling mechanism appeared to eventually return it to the original setting!
I subsequently took it up to my friendly main dealer who, with all credit to them sorted it there and then, and for no charge, but it needed to plugged into VCDS system because the car's computer supposedly knows where the lights are set and will always return them to that setting through the self levelling system. The fact that the body shop had not adjusted them correctly meant the on board electronics would always try and return them to that setting - irrespective of the fact all the adjusters are visible and reachable...
As I understand it, the dealer needed to disable the auto-leveling function then adjust the aim, before re-enabling the auto-leveling function. If adjustment is done without disabling the auto-leveling function then the risk, in some cases, appears to be that the end of adjustment travel is reached and it falls off the end, making subsequent adjustment difficult or impossible.
