Pity I only found this thread after being charged ?130 to switch the lever! VW claim that you need to remove the headlights to do the mod, which means bumper removal which means an hour and a half of workshop time. As I was driving to Tignes that afternoon (1,500 miles round trip) I wasn't in a position to argue about how ridiculous ?130 was to legally drive on the continent (and, in theory, another ?130 to return the lights to UK spec).
After catching sight of the VW instructions for the job (as in your PDF) I decided to reverse the operation myself by feeling for the lever inside the headlight; on my '05 car both levers are wing-side of the light.
One hint: it's much easier if you remove the Xenon power unit. It's got "open/close" written on it, you rotate it in "open" direction and the supply wires will disconnect themselves as you rotate - this is a safety feature so that you can't expose the bulb contacts on the power unit with the power attached. With this removed it's easier to reach the levers. When you've flicked the lever, you reattach the power unit, rotating it in the "close" direction, then fit the supply cable again; this only fits in one way and although you're fitting it pretty much blind, isn't hard to do.
The whole operation took me no more than a minute per side, which is a damn sight better than going to the dealer!
Thanks for the post - most useful to see the actual diagram. My dealer wouldn't let me take a copy of his sheet...