Greetings from Austria! I bought a used TT. black, 165kw, 60000km Built 2002 Bose, Xenon, sports package, fullheather etc…. The seller is a good acquaintance and meant that he made a software tuning at 54000 km, which on average should bring about about 25-30 hp more. I would be interested in what exactly changes with this tuning and what it looks like with the durability of the engine? What do I have to pay attention to? Of course, I don’t care to “step” the engine in the cold area. I noticed very positive that the car consumes only 9-10 l Super in normal to slightly sporty driving. I also found that I was not so fast and safe on snow with any other car. Conclusion: I only had the car for 2 days and am more than thrilled. (Bin only 25 and had previously a Golf 4 with 75 Ps ;-( mfg chemicalmax