The MK6 Golf uses a twin filament bulb: H15 for its DRL and High Beam.http://www.autobulbsdirect.co.uk/H15-Replacement-Halogen-Bulb.htmlTo use this would also require modifying the existing bulb holder and additional wiring.
I seem to recall reading a post saying that you can have a Vagcom modification which runs lower voltage through main beam bulbs using them as DRL's.Can anyone confirm if this can be done?