Well if they are the main beam I wouldn't worry about the power to the solenoid to allow dual full beam...one step at a time!
Here's some info I've found to explain:
The headlight housings are bi-xenon headlamps but when installed in a car with halogen headlamps, without running the shutter trigger wires, they will only work as low beam xenons. The high beam will still be halogens. The shutter is normally down for low beam operation. When the trigger wire is powered, it flips the shutters up to make the same light bulb high beam. The trigger wire goes from pin 11 on each headlamp plug to a highline central electric control module (CECM). Only package 2 or cars equipped with factory foglights have highline CECM. Other cars have mid or lowline CECM. If you don't run the trigger wire to the CECM or don't have a highline CECM the high beam will be halogen only. If you don't have a highline CECM it doesn't matter if you run pin 11 to the CECM because it can't control the high/low beam shutters.
If you run the extra wire, with the headlights off, when you pull the control stalk to flash your headlights "flash to pass", the halogen high beams will turn on. This is because it's not good for the xenon lights to flicker on/off and they can't respond fast enough.
With the headlights on, if you pull the control stalk, the cut-off shutters will flip up to expose the lights to expose the high beams as long as you hold the stalk. When you release the stalk the shutters flip back down to the normal low beam spot. If you switch to high beams, the cut-off shutters will flip up and stay up.
The easiest way to know for sure if you have a highline CECM is to use VCDS and use it to look at the part number and see the tests at the bottom of the page.
Drop me a PM with your email as I have found a guide for a MK5 Golf which I can send you as a pdf.
