My car makes my hair gray! Always something new. For some time the engine is running on only 5 cylinders. I already tried to see sparks, other ignition cables. At BOSCH service I had a compression test on the cylinder done. This resulted in 7.5 bar, which the performing mechanic thought was okay. Since the car on LPG runs as unevenly as on petrol… I would have thought now that no petrol or gas is injected into the cylinder. Or what can this be done? What about compression? When I look at some compression diagrams on Google, they usually stand at 10 or 11. What would I have to have or are the 7.5 bar for the approx. 320,000km okay? The car ran unround after starting….although I was driving a normal highway 3 hours before…everything quite normal. Car parked…after 3 hours I wanted to leave again… and there he was running**. I am grateful for every tip. P.S. If it gets really bad, an a Change machine/a different head. Do all AAH engines fit with 128kW (Quattro, B4, C4… switch, Automatic…)?