Hello dear forum, My alternator in the V50 T5 2008 makes very annoying noises/vibrations. Already for a long time, but now acute. I want to exchange them and would like to know. 1. How is the belt tensioned. Is there a pulley? 2. Does someone have a part number? On the alternator is a paper, however, the completely futile. Belts and if there is pulley I would also exchange. Does someone have a part number? 3. Does anyone possibly have a repair instruction? 4. Should anything else be exchanged, or considered?