w220 low rear left suspension.
I have a problem with my rear left suspension being an inch or 2 lower then the rear right. The front left was sat in a hole so i leveled the car up, played around with highering the ride hight, but the rear left seems to keep a constant 1-2 inch diference.
The air compressor seems to work as it should (not running all the time) and i cant hear a leak from the strut so im ruleing a leak out, but im a bit stuck now.
Any ideas?
One other thing though, when i was listening for a leak i did hear a hissing but its comming from behind a plastic pannel under the car above the exhaust box, is this the fuel pump? Should it hiss?
many thanks in advance for anyhelp



