Hi my 2013 Alphard GGH20 drivers light bulb expired took it out and popped down to the local parts place asked if they had the same one Osram D4s 35w 66440 but only had a generic Drive tech bulb fitted it and all worked lights levelled etc went for a drive the next night and a little way in the AFS light started to blink not on right now HELP can any one suggest how to get the AFS to work? I have ordered in a Osram D4s incase the system require an original bulb to work and do I need to disconnect the battery to reset any help much appreciated