Hello! There are 3 brake lights. The 3rd brake light at the top is not working (it has TÜV faulted). Passage is measured. Pear is ok. I could not measure any voltage at the two cables of the 3rd brake light at the top when the 2 bottom lights were shining. According to operation, one and the same fuse (front in the box under the steering wheel) secures all 3 brake lights. And this is also OK. What now? Thanks for help !!!! (EZ: 2006 / 1.4Lr, 57KW)