Hello, I’m new to the forum. I have a 2011 gl450 that was having intermittent low ride level on left rear wheel. Low after sitting but usually regained normal ride height. RecentLy it began remaining low but would periodically raise. Compressor constantly working. Replaced valve block and and repaired cracked compressor hose.now car is down on all four sides. I have malfunction icon on dash. No compressor sound. Please help me! So frustrated!,,

 

Hi - go read up on airmatic and it’s failure modes, there are several threads on this board with this background information.

you likely have leaky air springs, and they will need to be changed out as well. Allowing your left rear leak to persist over time has overtaxed the compressor and now it is burned out. The valve block was unlikely to have been the culprit on this, I hope you saved your original one because most aftermarket ones are not good quality.