Do the headlights in my A4 B7 Avant have a lever on them for flicking the beam over for European driving. Or is it a case of stickers on the headlamps
In a word no. You have 2 choices, either use stickers over the headlamps (simplest) or if you have access to VAG-COM I believe you can make changes which will make the adjustment.
AFAIK only the adaptive lights can be set to "tourist mode", at least that's my experience.
Some B6/B7s have the lever and some don't - it just depends what headlamps the factory had at the time your car came down the line.
I'd go for the Audi headlamp protectors - not only do they protect yopur headlamps from stone chips they also have the place to stick the "black stuff" marked on them.
2006 RS4 Avant (Phantom Black), RNS-E (2010 version inc SDS, HW 070, SW 0220) with AMI (250GB hard disk), Bluetooth + iPhone 5