Last week, my A4 told me the right rear light bulb needed replacing. Had a check and it appeared the inner bulb for the red rear lights was out (there is a single filament on the inside and dual filament that doubles as a brake on the outside). Got round to buying a bulb this morning, whipped the light out and the bulb was fine?? Replaced bulb anyway but still no luck.
Thos makes me think it is a wiring fault but I don't know where to start other than using the left side as a source and splicing a wire to the right light, but I guess this wont help the computer telling me there is a bulb out. Anyone else had a similar problem?