I got my 2009 A4 with xenon lights s-line...i have noticed recently that the lights bounce when i go over bumps and imperfections in the road, i have checked the connection everything seems ok. I have had cars with self levelling xenon lights never had this issue. Surly this cant be normal, car has 100k on the clock. 

 

Cheers Jake 

My left is shaking as well. Im planing to take it out and have a look inside as most likley one brakets holding the lense is lose or self leveling mechanisim ... 

Super annoying considering is a very well build car, i have checked everything it seems solid my only guess would be something inside surly this is a common problem on these 

It must be even more annoying for drivers on the other way