Hi guys. My brother in law has an A6 "c5" avant from the year 2000. He failed the MOT yesterday. They told him that the right driver light beam was to high compaierd with the left side. The car is equipped with xenon lights. The mechanics from the MOT said that it was only possible to adjust via diagnostics (vagcom) Can you guys confirm this? I have the VagCom w/CAN so I am able to help him but need som advice. Thanks.