Hi Adrenaline,
I assure you that I'm not loaded, I merely meant that for an electronic control unit which handles all of the convenience functions of the car, £200 isn't bad. It doesn't do just the lights, but the alarm, interior monitoring, electric windows, parts of the climate control system and so on.
These units can be found second hand, but will need re-coding, which will still cost about £80 from Audi.
Cheers,
Mike