I know it sounds like it should be obvious, here are the facts.
The allroad has:
Self leveling lights,
Headlamp washers that work,
Vagcom will scan the xenon range adaption module and bring back no fault codes.
The headlamp bulbs are nothing like as bright or as white as the RS.
So from what I can tell the allroad has most of the necessary hardware, could it be a previous owner just put the wrong bulbs in?
Also if the car didnt have xenons surely vagcom would try the address and upon receiving no response just move on to try the next module...?
Your thoughts gentlemen?