David Cogswell

2010 E63 123k miles
I just replaced one of the rear hub/bearings. I had the car "hanging" for about 4 days on a lift. After completing the replacement, my air suspension is not filling back up and it's riding all the way down. I do not have the "malfunction" alarm on the dash. And I do not "hear" the compressor turning on when I start the car. I've tried cycling the car on and off along with driving it around the block a couple times. But still no air in the bags.

Any suggestions?

PeterUbers

Something to try

https://mbworld.org/forums/w212-amg/...ch-corner.html

also - have to looked at airmatic parameters with icarsoft or something similar?

David Cogswell

I'm guessing it has something to do with the parameters for ride height not being correct. This would explain why there's no "malfunction" warning on the display.
I have a scanner but, not sure if it has the function to reset ride height.

Side note: I've had the car lifted before with both back wheels in the air. I did rotors and pads which took about 4-5 hours. But, after, I didn't have this issue.
So, I'm wondering if the duration of changing the hub 5-6 days (all 4 tires off the floor on a lift) is why the system may have "reset" itself.

CaliBenzDriver

I am not an Airmatic guy but I can recommend you direct your attention to read your height sensors.

It is interesting the controller is not even trying to fill airbag... this troubleshooting step will show you what the computer sees.
A little silicone spray may be the quick fix!

David Cogswell

Yes, I'm sure that's what it is considering I don't have the malfunction alarm. Can these be reset without a scanner?

David Cogswell

I tried pulling the fuses (12 under the hood and 68 in the trunk) with the car off and the suspension drooping. Then raised the car manually with a jack, put the fuses back in and started the car.
No change, still droops.

PeterUbers

can't do without scanner

Baltistyle

Pardon me for not knowing if this model has it, but do you have a button that was supposed to be pressed before raising the car lots of air Matic or hydraulic suspension models have this? Basically, the car has lost its home position and needs to be rehomed

David Cogswell

The only button I have (or know about) is the button that has 2 shocks and 2 lights on it. It's right above the AMG button next to the gear selector. All this button does is toggles between 3 different settings. Nothing about raising or lowering.

kevm14

Suspension in comfort (no lights) will raise the back a bit.

David Cogswell

******Problem fixed**********

In talking with a Benz tech in the Santa Clarita valley... I was walking him through everything that I did. Then he had the idea that the ride height sensor (on the side where I replaced the bearing) must have "flipped".

So, I lifted the car and sure enough the sensor was flipped the wrong direction. This was most likely caused by me removing the bolt for the upper suspension arm.

The sensor assembly has two pieces. The actual sensor with a lever. Then a plastic piece that attaches to that lever and to the upper suspension arm. All I had to do was pry off (using a small screwdriver) the plastic piece from the suspension arm while still leaving attached to the sensor. I rotated the lever on the sensor to look similar to the other side but, this was not looking like it was correct because the plastic piece couldn't reach the suspension arm.
So I pushed on the sensor (its attached to a soft bushing) and got it into a position where the plastic piece could attach to the suspension arm. Snapped the plastic piece back on. Lowered the lift and immediately the air bags started to fill!!!

It's been good ever since....

Hope this helps other people diagnose a similar issue.

Now I need to do the front bearings....