Headlight mods for driving abroad
 

Ok, following my query about adjustable headlights, it appears I'll have
to go the old fashioned way and use black-outs or beam-benders on the
lights for driving on the continent.

Except...

Unlike every other car I've ever owned, my A3 has no marks on the
headlamp lens to show where exactly the tape or benders should be
applied. How do I know exactly where to stick them?
--
Toby