Donzee

Hi, I am Maarten from Amsterdam, NL. I drive a 2003 Cayenne turbo that has a faulty air suspension. I had the yellow "airsuspension faulty" message a couple of times over the last two years but now the car "lies on the floor" with a red airsuspension warning. Compressor is not running, when I connect the spare tire hose: no pressure either. When I bench-test the compressor directly it runs fine. At that point I decided I need a diagnostics computer and bought a Durametric kit. I get the following error messages from the Level Control module: 2250 (valve operating time exceeded, upper limit value exceeded) 1575 (manual control switched of) 778 (steering angle sensor, No signal/communication) [Cornering lights do not work either] 1487 (System function test faulty, Implausible signal) 1772 (Signal lead for pressure sensor, Implausible signal) When I try to read the actual values, I see things like compressor temperature and Compressor relay (off). I also read "System Status Number Control Mode" which reads 4010. "Deviation from normal level" and "absolute vehicle heights" also show plausible numbers. Battery is in good shape. When I scroll further down, there are many signals that do not show any values and that seems strange to me: "Accumulator pressure", "Terminal 15" all stay blank. Maybe these are simply not supported by Durametric? Any tips? Where is the pressure sensor located (related to 1772)? Can I start the compressor manually to fill the system? I know the Porsche tester can fill/bleed the Level Control System Thanks in advance, Maarten