Hi, On my 210 S3, I seem to go through a "flat spot" between about 3500 and 4000revs. When accelerating hard, from lowish revs or even from about 3500rpm I notice what seems to be a loss of power between these two points which then gets better again after 4k. Does anyone else notice this and is it just a characteristic of the engine (that maybe a chip would iron out!)? Or, could it be the MAF - just guessing as I've heard this can cause loss of power if faulty but don't really know what this does - anyone tell me what this is??! Cheers for any advice/experience, Pete.