Hiya!
I have a 2007 525i M-Sport wagon, a month or so ago I had a Level Control System Failure pop up on my dash. I took it to my regular mechanic who's always been super good. He plugged in the diagnostic and couldn't find the source. He even put the car on the hoist and tried checking out the sensors and compressor. Turns out, for some reason, water was getting into the spare wheel compartment in the boot where there are relays and other components. I pulled this all apart, dried them all out and put it back together again and that got rid of the failure.
But just recently it's happened again, but, I tried the same thing where I removed the water and dried out the relays and it didn't work. I even brought new relays in case they had corroded with the water. The system failure is still there. And one day the compressor was running hard out, even when I had turned off and locked the car.
Does anyone have an idea on what may be wrong? I've tried tracing all wiring and everything I can. The car air suspension seems fine, it's not sagging at all either. Any help would be super appreciated!
