Hi all - my 03 A4 has Xenons, and one of the sidelight bulbs has blown. "No problem" I thought, popped to Halfrauds, double checked the bulb listing and sure enough it said I needed the standard 12v 5w push in type. Pull the old bulb out (tricky, it was in the bulb holder very very tightly, and the contact wire was soldered on). Put new bulb in, except I can't, it doesn't fit. Does anyone know what type of bulb is in the Xenon sidelight? It almost looks like a halogen. There are no marks on the glass to indicate a part number or a wattage.