I just got my 2004 A6 with HID lights and I notice that the drivers' side has a slight shake to it. I can see it when I am stopped at a light with another car in front of me or when I am facing a wall. Is this normal? I wouldn't think so but ............... If it's not, any ideas what it could be. It's under CPO warranty so it's not a big deal.

Thanks for the help

 

The bulb coulb be loose in the holder, the headlamp assembly might not be torqued down, the headlight adjusting motor is going crazy, things like that.