As I've become bored with the standard yellow-tinged interior lights in my B5 Avant I've changed all the interior lights to white LED bulbs and I have to say it looks very good too........ However I have one problem that I can't seem to solve. The main light unit mounted on the roof consists of 3 bulbs , a middle festoon bulb (the main interior light) and a BA9s bulb (for the map reading lights) on either side.... The BA9s is a small bayonet fitting bulb, the same as a pre-facelift front headlamp sidelight bulb, except for interior use Audi fit ones rated at 5W instead of the normal 4 watts . This brings me to my problem, try as I might I cannot get the LED bulbs in these map reading light fittings to work! The central LED festoon bulb works perfectly , but when installed the LED bulbs in the map reading light bulb holders wont work at all. Consequently at the moment I have installed the LED central festoon and the 2 old incandescent bulbs, so each time I open a door the light is an odd mixture of pure white and yellow, lol. I know LED bulbs are sensitive to polarity but the bayonet fitting bulbs can only go into the bulb-holder one way so cannot figure out why they don't work? I've tried 2 different sets of LED bulbs now from different suppliers with no joy, can any body offer a solution? Thanks!