Hi I have just received a brand new seat belt tensioner from ebay for 20 quid and its the original from audi unused in the box....bargain. But as I was looking in the haynes manuel on fitting it. There is no explanation on how to do it as it says it is complex to fit and should be done by an audi garage. Has any one fitted one before and can I do it my myself as I don't wana pay audi 280 pound an hour for labour. Thanks a lot. Steve