no, i only fitted the headlights as one unit. i had a quick look at them before hand and it seemed to contain all the gubbins inside i.e servo motors etc. They actually came off an
ibiza sport like yours and i was initially concerned that i would have to fit the headlight cleaners aswell as i thought that it was all one unit. The techies were also saying that the headlight cleaners were needed as the xenons over heat and they helped to cool them down. I thought about it for a while then realised that they were talking rubbish as i live in Acapulco and it hardly never rains here, therefor i never use the windscreen wipers!! (its a law thing apparently)
The xenon controller that you mentioned with the vag com maybe to ativate the auto adjust upon switching the lights on, as mine at the moment dont move when turning them on, when i fitted them i just adjusted them with the screws to make sure both were at same level and then made sure that they moved from adjusting the switch inside the car.
Thanks for the info on linkage !!! as i think you are right as one of them had been opened !!