Alright, had the hose replaced...no more leaks, but the car is still sagging on the driver's side about an inch more than the passenger side. What can cause this??

My mechanic doesn't really seem to know...he thinks it could be a lot of things. Could be bad leveling struts, bad accumulator on one side?, bad leveling valve, or even a squished spring pad?

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles