Vehicle rising please wait under driving
Thread Starter
Member
Joined: Oct 2018
Posts: 143
Likes: 33
From: Arctic Circle
W124 W212
Vehicle rising please wait under driving
When I drive the car, suddenly it loses all the pressure in the bellows and drop instantly. Both bells have been replaced recently.
Previously, it only lost pressure while the car was standing still. Now it keeps the pressure all the time but sometimes it suddenly loses all the pressure while driving.
As you can hear in the clip, the pump goes but the bellows do not get pressurized. After some restarts the bellows got pressure.
This car has only auto self leveling rear suspension, not airmatic system. Any idea?
Previously, it only lost pressure while the car was standing still. Now it keeps the pressure all the time but sometimes it suddenly loses all the pressure while driving.
As you can hear in the clip, the pump goes but the bellows do not get pressurized. After some restarts the bellows got pressure.
This car has only auto self leveling rear suspension, not airmatic system. Any idea?
Senior Member
Joined: Apr 2012
Posts: 432
Likes: 96
From: Just north of Detroit,Michigan
2012 E350 4Matic P2
I have some experience with Airmatic on my previous W220. Since you have only the rear to worry about, the possibilities are cut in half. Watching your video, it seems to me that your pump is not putting out enough volume/pressure to inflate the struts. They should pump right up. I would begin by searching for a leak in the valve unit. You are looking for something that is common to both sides since it is sinking equally. I would have the pressure checked on the pump, I can't recall exactly how much pressure it should put out but I think between 8-10 Bar, (might be a little more). If the pump is not putting out enough pressure, it will time out.
Airmatic is a great system but can be very frustrating.
See attachment for an overview.
Good luck,
Bob
Airmatic is a great system but can be very frustrating.
See attachment for an overview.
Good luck,
Bob
Thread Starter
Member
Joined: Oct 2018
Posts: 143
Likes: 33
From: Arctic Circle
W124 W212
I have some experience with Airmatic on my previous W220. Since you have only the rear to worry about, the possibilities are cut in half. Watching your video, it seems to me that your pump is not putting out enough volume/pressure to inflate the struts. They should pump right up. I would begin by searching for a leak in the valve unit. You are looking for something that is common to both sides since it is sinking equally. I would have the pressure checked on the pump, I can't recall exactly how much pressure it should put out but I think between 8-10 Bar, (might be a little more). If the pump is not putting out enough pressure, it will time out.
Airmatic is a great system but can be very frustrating.
See attachment for an overview.
Good luck,
Bob
Airmatic is a great system but can be very frustrating.
See attachment for an overview.
Good luck,
Bob
