Hello from Australia.
We have a 2007 ML320 with 2 problems that I would appreciate some advice with.
1/ The air suspension on one (rear) wheel has a tendency to 'sag' if the vehicle is parked for 2 hours or more. It immediately re-establishes height and correct suspension once the door is unlocked or opened. It also emits a 'hissing' noise over the affected wheel. It is then fine for driving and doesn't show again until it has been parked for a couple of hours or more. I have been advised that I may need the shock absorber and airspring assembly replaced.
2/ The engine has lost a lot of power (virtually overnight) and I think it is driving in 'emergency mode'. I have been told that the ML320's have a history of the Inlet Port Actuator breaking down and having to be replaced.
Has anyone else any similar history with their car and are their any other known possible causes.
Thank you,
Peter.



