Hi, I got quite cheap to a Phaeton V6 (BJ 2007) with almost 300,000km. Since the car had new TÜV and made a very well-kept impression on me, I bought it without thinking big about it. I now have the following problem with the car: After already a few minutes standing time (engine off) the car lowers at the front left (a hissing is to be heard) on the right side it descends slightly. Auto pumps up again normally. My question is: Makes sense without to search for the cause directly to install new feather legs or make it sense to look with leak-search-spray for the leak. I would be interested in your experiences and opinions. MFG Domi