Well ALL Xenon lights on any car need a halogen light to act as a "flasher" this is because xenons flicker slightly when they are first lit so they cant be operated for the purpose of flashing people because of the time delay..I've gone for them as well. But are you sure they're bi-xenon? If so, what purpose do the two inner-most lights (closest to the centre of the car) serve - I thought these were main beam?
DittoThe Xenon light is worth the price, it is really giving the light much ahead. There is one big problem....almost everyone I drove by were flashing their main beam to me, they thought I was using the main/full beam behind them []. It is auto height adjustment, there is nothing I can do about it...
In that case they are they not just xenon? Our Merc was standard xenon, and had main beam (full and dipped) as xenon but with standard side lights as you are describing for the Golf. The latest Mercs now have bi-xenon which must be different.Just standard, and look yellow beside the Xenon [] even with the Philips Blue Vision Bulbs