Hello I bought a 07 s550 in April. I have read almost every post that had anything to do with airmatic and no luck. Park place has kept the car for a couple weeks on several occasions and still can't figure it out after replacing the front drivers strut the front pass. Strut twice,(arnotts) 3 pumps, control module and control valve and two ride height sensors the Damn light still comes on. Star's code is 5285 suspension strut filling too slowly. The workshop manual said to check wiring to pump for chafing it Has been checked by dealer and two other certified techs and they can't find the problem. Has anyone else had this issue?