06 Jetta highbeam adjustment
I used your method on my 06 Jetta and it worked nicely. However, there seems to be a swap of the labeling of L2/H2 & L3 in the second photo:should they be reversed?
L3 is shown on the third photo as a horizontal adjustment, and is difficult to see since it is somewhat hidden by its recess in its access hole.
Finding a tiny hex socket for L3 may not be easy, so I made a nifty tool by using a small socket head cap screw, whose hex fits over L3. You can use a 5/32, but the correct size is a 4 mm. Use a long one, so that it sticks out of the access hole. Then attach & jam some nuts on the end of its threads - this will allow you to use a small socket to turn it. I can send you a photo of it if you wish.