ML500 W164 2009 Model Doesnt want to drop from OFF ROAD LEVELS
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Newbie
Joined: Mar 2021
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W164 ML500 2009
ML500 W164 2009 Model Doesnt want to drop from OFF ROAD LEVELS
Hi
I raised my ML500 W164 2009 model to the OFF ROAD LEVELS. I turned the knob to drop out of OFF ROAD LEVELS. It sais BUSY LOWERING on the dash screen. It does not drop at all?
I replaced the pump and the valve block.
Any ideas about what the problem could be?
Thanks
Enrico
I raised my ML500 W164 2009 model to the OFF ROAD LEVELS. I turned the knob to drop out of OFF ROAD LEVELS. It sais BUSY LOWERING on the dash screen. It does not drop at all?
I replaced the pump and the valve block.
Any ideas about what the problem could be?
Thanks
Enrico
Super Member
Joined: Nov 2019
Posts: 648
Likes: 144
From: Yeast Coast, Canada
GL550 X164
Have you checked your level sensors? I doubt all are an issue, but if a couple of them are seized/stuck, they won't allow the truck to lower. Check the arms and make sure they can be moved/wiggled by hand at the joints where they mate with the height sensors.
Do you have a scanner capable of pulling airmatic codes?
Do you have a scanner capable of pulling airmatic codes?
Super Member
Joined: Apr 2004
Posts: 783
Likes: 108
From: PA
E Coupe C207, ML W166, ML W164, Sprinter 1500/144, W111 SB220 Fintail(s), A5 chassis Beetle 5+5
While considering lowering options for my sprung ML, I thought, hey maybe do generic bags, but without an internal pump or block to deal with. Just a pair of Schrader valves on the bumper someplace, to fill and adjust manually, not relying on a cockpit control.
That is, I wonder if, at a certain point, it's worth abandoning the original system and "hard wiring" new air lines.
That is, I wonder if, at a certain point, it's worth abandoning the original system and "hard wiring" new air lines.
Thread Starter
Newbie
Joined: Mar 2021
Posts: 2
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W164 ML500 2009
Hi
I checked the level sensors. They all good.
Looks like the release valve or something in the valve block is not functioning. Its a new valve block so Im guessing it could be the wires between the valve block and level control knob.
I checked the level sensors. They all good.
Looks like the release valve or something in the valve block is not functioning. Its a new valve block so Im guessing it could be the wires between the valve block and level control knob.
Super Member
Joined: Nov 2019
Posts: 648
Likes: 144
From: Yeast Coast, Canada
GL550 X164
What brand valve block did you use for replacement? Some other members have had new but faulty blocks from non MB manufacturers.
If you suspect wiring, you can check them for continuity to start with. I've not been forced to deal with the valve block yet, so I don't know how easy that wiring test would be.
If you suspect wiring, you can check them for continuity to start with. I've not been forced to deal with the valve block yet, so I don't know how easy that wiring test would be.
