Hello! If I had a question here that just cost me some nerves on the way home… At low speed and in thrust mode, the battery lamp lights up from my B4 (BJ 93 1.6l/ 74 kw). I tried it around, at speed from 3000 upwards it goes out again and in the stationary gas lights up nothing. I am in need quite high-touring at home. I am absolutely perplexed… I already measured LiMa out of all desperation, brings between 14 and 14,1 V. So must fit. Battery is also possible. I have 2 V-belts. A thin one and a wider one with longitudinal grooves. Could it be because one of them is not tense enough? How strong do they have to be tense at all? Thanks for your help!