Hi, just had my Mercedes CLS 320 CDI 06 motd, its come back to me with the suspension stuck right up in the air! Mss centre now says visit workshop, had it scanned for fault codes has a stored code of....... 5350.........(Airmatic pressure release valve). Open circuit. Am I right to think this could be a broken wire OR Pressure release valve? Have spoke to Mercedes parts and they seem to say that's its not a valve, they show it as a pressure switch. I might have it wrong, was shown the component on the car it was fitted to the pump N/S/F under/ behind the bumper. Any help please would be appreciated, now have vertigo!!!