I have just had my car serviced at an Audi specialist and the guy said after taking it for its MOT that the car wasn't performing as well as it should be doing. He said that it didn't have the urge to move as it should do across the revs and so he thinks that I need a new mass air flow sensor which he estimates at £200. He said that this problem didn't show up on the computer diagnostics. Does this sound like the case? Is it possible to clean or fix th existing meter? Can you get these from a scrapped vehicle or would these probably be dodgy too it it's a common fault? Thanks for reading this and any help is much appreciated.