Fasani, might you be able to answer a couple of questions about the self-levelling system on your car? I would assume that there is some kind of ECU (Steuergerät) in the trunk connected to the system. Have you ever seen it, and does it have cabling with a "T"[est] connector, you know, the Fiat 3-pin type? I'm just trying to "connect the dots", there is a particular Marelli module—M15A—that is for testing "Niveauregulierung" with the Fiat Lancia Tester and I'm wondering if this is the system that it was designed to test. Looking at the code in the third eprom of the module there appears such terms as "compressor", "solenoid left", "solenoid right", "compressor relay", "sensor on the shock absorber", "pneumatic circuit", "did the fzg[?] alter the niveau position?" in short, all vocabulary related to self-levelling control. Thanks!
I'd love to see a photo of the control unit if you can find it.