and this
The service manual specifies the use of a special target on a specially flat floor etc, but if you have a surface flat enough to not roll on, that will do. You don't need the target to do a differential adjustment - ie 'up a bit', or 'up a wee bit less'
Backstory: I found my headlights pointing up into the car in front's rearview, which is not good. You should see the upper edge of the beam at around the level of the rear reg plate of an average car in front, at about 30 yards. Basically I adjusted mine once, went out and tried that and then adjusted them again and I was done. You could equally park far enough away from a wall on a flat surface and do it that way.
Park up and let the lights adjust to what they think is 'level'
Pop the bonnet and look for the white inner adjustment knob on each headlight - those do the height adjustment. The white combined allan and x-headed screwdriver socket on top is what you want to turn - a philips head will do - (the knob at the back will then turn on a worm screw and make the adjustment)
The left-right adjustment screws are on the wing-side of each headlight - one is under the air intake.
Plug in vagcom check for any DTCs and then enter the Xenon Range menu 55 in the Common tab of the Select Control Module menu. Then click Basic Settings and type 001 into the top left box.
It'll say 'Wait' and then once the headlights are in adjustment mode I think it says 'Adjust now' or suchlike and then you can go and twiddle the knobs on the headlights till you get a nice pair of images from the two headlights at the level you want and with the angles (Please correct me if I have this wrong, oh ye of greater knowledge)...like this
____ ______
\______\_______
with the same spacing as your headlights, between the angles.
When you are happy you NEED to type 002 into that same box in vagcom.
Now go on the road and figure out how much you still need to adjust them and repeat until happy. You may not even get your fingers dirty!
