Hi there (Sebastian, this is pretty much addressed to you....oh, and just spent a lot of ZAR ((South African currency LOL)) on a HEX USB - your fault of course! Looks like a very useful "tool". 1.Replaced the previously faulty MAF and it is reading within the stated spec...and climbs as you rev the engine, however seems no difference in performance, although don't want to thrash it just yet...Upsolute chipped and freeflow exhaust, would that make a difference or does the ECU have to "learn" the fact that the MAF now works after about 2 months? 2. Also, I get this fault code, not sure how to tackle it? Address 08: Auto HVAC Part No: 3B2 907 044 J Component: CLIMATRONIC B5GP 0004 Coding: 17000 Shop #: WSC 00028 1 Fault Found: 01274 - Air Flow Flap Positioning Motor (V71) 37-00 - Faulty Help would be most welcome..!