Haldex coupling

Hello together, I have problems with the Haldex clutch from the Quattro drive on my TT 1.8 Quattro 225 HP. In the case of tight curves at the pace of the step e.g. when turning the Haldex clutch. Since I bought the car only recently used (EZ5/99 85000km) I was with Audi. Result: too little to no oil in the Haldex. The oil was replaced. The noises were therefore much less and then completely gone. At Audi however, you did not know whether the too little oil caused a defect. If it would get worse they wouldn’t know what it is, because the Haldex consists of so many parts. One would then completely exchange. A new one costs 2200,- Euro + installation. Ups ! Yesterday the knarzen starts again. I drove the day before 100 km highway. My question had someone similar problems or has someone idea with the Haldex coupling ? Find it to say from the A. center naughty because we swap everything, since it must also wear ile give e.g. to the lamellas, which one exchanges. Hope I can help someone 🙂 Greetings