Hello and a nice greeting to all Audi drivers. I’ve been having the rehearsal for about 3 weeks, which some lights in my B4 don’t really work. Sometimes they go and sometimes they don’t. With the rev indicator it starts now. I turn on the light and the last bulb doesn’t want to. but then after about 1 min it goes again. What can that be? I’m open for everyone’s suggestion. thank you very much. Mfg