« Reply #7 on: 09 November 2014, 14:56 »
They will have rollers and they will have headlight alignment testing equipment and it will be properly calibrated.
You don't need rollers to do headlight alignment.... but you will need a VW tester, ODIS, VCP or VCDS to align xenon headlights. MOT stations will most likely only have a generic OBD2 tester - they would have little use for dedicated VAG diagnostic systems. As I said you can also go to other VAG marques...
I, and I think IDC too, was getting at the possibility that the xenons go out of alignment actually on the move rather than on start up so if the car was put on rollers it could be tested 'moving' and not just stationary (bearing in mind that the headlights have motors to adjust the beam) and then the car could be taken back to VW with the orders of "here's the report from an MOT station, now please at long last get this fixed"
Quite a few independent garages keep a VCDS cable tucked away too, they're quite common!

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