Why has the front of the E320 lowered where the tires are rubbing the wheel arch, especially at the driver’s side? Is Mercedes air suspension repair expensive?

This is a fairly common problem with the airmatic suspension on the Mercedes E class especially once it completes 75,000 miles and is prone to face more problems as it ages. In this case the front suspension strut is leaking. Struts are more expensive to replace and cost approximately $1,000 each, however if you opt for aftermarket remanufactured units, it may be more economical. Strut replacement usually requires two hours of labor. Another possibility could be leakage from an air-line which is a cheaper repair. Since most Mercedes air suspension models are prone to leakage, it would be a good idea to begin by inspecting the Mercedes air suspension for leaks. Since the car appears to be more affected at the driver’s side, the driver’s side suspension strut could have failed.