Moin, I bought a Golf 7 2.0 TDI with 6G-DSG and 150hp. Absolute full equipment, i.e. floor heating, sliding roof and e-seat etc… 134,000 kilometers run and complete checkbook. And precisely because it is my dream car (which I can afford with my job), I now want to change/improve something about the vehicle. By the way, service is meticulously adhered to and carried out rather too early than too late, that is ahead. The noises are dependent on the speed, which is why I assume that you are coming from the turbo or something is leaking at the cracker and air escapes, because it sounds like some kind of air escapes. I have no idea how the two previous owners handled my car, I would like to do something good for my car and the turbo on Stage1 (Stage 2 would be even better, but unfortunately no There is a turbo center in Berlin, which offers this service for affordable prices (less than 1000,-€ ), I would like to use this service. Quotation: The aluminium milled compressor wheel is significantly more stable than the comparable version of cast aluminium and can therefore be made thinner. Due to the thinner production, the O.S.T. wheel loses weight. Due to the lower mass inertia, the Verdic rotates. In addition, the turbo is taken apart completely and checked, so exactly what I want. Now to my actual question: This metallic noise, which sounds a little bit like whistle/grinding/ or rather like air that escapes, surely comes from the turbo or leaking from the cracker?! Performance is there, but this noise makes me so crazy that I only drive around with music.. As I said, it drives for 150p s how it should drive… gearbox switches smoothly… but I want if I have to expand everything anyway to check this leak, immediately overtake/improve the turbo and then have the ( hopefully ) next 150,000 kilometers rest. Stage2 would be better, are also only 300,-€ more, but according to them one would have to strengthen the system (probably motor and gearbox meant ) and then I wanted to know from professionals like you, what exactly is meant by it? 6Gang DQ250 is supposed to last up to 450nm before it starts to slide and I already have a new exhaust system ( Oettinger ), but what am I supposed to strengthen on the engine then? Please don’t discuss the meaning, I know then I could have bought a GTD, but I have this car now and would like to drive the next years ( hopefully ) still 🙂 Sorry if I wrote so gibberish, I just didn’t have it with precise questions 😉 Oh yeah and I know, that you don’t have a glass ball, but maybe you have some experience. I’d be happy to have helpful answers! Here’s the link because of the stages:https://www.turbozentrum.de/OST-Details-Stage123