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Hello,
2010 e550 sedan with airmatic.
Rear passenger was sagging so replaced both rear airbags.
Now car is at about even and at correct drive height, BUT the sport/comfort airmatic button stuck on Sport.
The airmatic raise car button works fine and raises the car up.
I cleared airmatic system codes and cels using an icarsoft tool.
The car still stays in sport and won't switch back to comfort
Any suggestions on what to do? Is there a reset or something I need to perform?
Last edited by Boarderjosh10; 05-03-2023 at 12:08 PM.
Hello,
2010 e550 sedan with airmatic.
Rear passenger was sagging so replaced both rear airbags.
Now car is at about even and at correct drive height, BUT the sport/comfort airmatic button stuck on Sport.
The airmatic raise car button works fine and raises the car up.
I cleared airmatic system codes and cels using an icarsoft tool.
The car still stays in sport and won't switch back to comfort
Any suggestions on what to do? Is there a reset or something I need to perform?
I know 2-fingures a part from nothing about the best MB air suspensions besides the air bags, valves and compressor or smart controller. I can guess if that helps move you back on the road...
The part that you may want to look into is the button selector. It's a low-power solderless network module. First class!
> ACTION:
Hook up your scanner and read inputdata and faults from the airmatic module.
Lets figure where control is stuck
Last edited by CaliBenzDriver; 04-18-2023 at 04:47 PM.
When you say check input data with scanner, which data? As of now I do not have any codes but I have the historical codes from airmatic. The level heights look to be close to even on all 4 wheels according to the scan tool.
When you say check input data with scanner, which data? As of now I do not have any codes but I have the historical codes from airmatic. The level heights look to be close to even on all 4 wheels according to the scan tool.
When you drill dow to open the Airmatic module, besides "faults", what other options are presented to you... live data or whatever the naming.
These systems are not designed so you can simply rely on "no faults" reported. You need to comb data with your thinking cap on.
Once you locate the data input of interest you toggle the buttons back and forth watching the live data from your scanner.... then report findings.
Here are some screenshots of the carsoft.
notable mentions, compressor locked due to onboard electrical system limp-home mode is yes.
The status of driver request says comfort button the button is lit on sport. If I press the button down for about 2 seconds the carsoft says the button is activated. So assuming the button works.
C153713 right rear damping valve has open circuit.
Both rear airbags were replaced, so not sure what else would need to be swapped. Prior to the bags being replaced the right rear was the lowest sitting corner of the car.
Good troubleshooting, the fish came in! Have we made progress with the live data or what....
1-- We validated your issue is NOT the working S/C Button.
2-- You have one big-bad ACTIVE FAULT (air valve elec. malfunct.)
3-- Your suspension itself is in its very own limp-mode. It no longer can act upon your commands. That's causing your S/C complaint!
> NEXT:
Concentrate on fixing your active fault to get out of the limited mode.
The issue lays in a damping control circuit. I would check connector for corrosion or bad GND nearby.
Then use a multimeter to measure command voltage.
Then S/C will get resumed.
Last edited by CaliBenzDriver; 04-19-2023 at 07:53 PM.
Thank you!!!!
Damping control circuit I thought is part of the rear airbags?
I replaced the airbags so not sure which component you are menting cleaning.
looking at the voltages the front shocks seem to have a wider variance compared to the rear. The car says Y54 is defective.
The circuit of the rear right air control valve that controls your air bag has issue. It's the valve circuit that controls air pressure to that one airbag.
Check the electrical values are correct (no open or short), internal resistance, voltage as well as valve mechanicals: open/close, check for leak and rust from air moistures.
Last edited by CaliBenzDriver; 04-20-2023 at 03:12 PM.
The circuit of the rear right air control valve that controls your air bag has issue. It's the valve circuit that controls air pressure to that one airbag.
Check the electrical values are correct (no open or short), internal resistance, voltage as well as valve mechanicals: open/close, check for leak and rust from air moistures.
Thanks!!
I am having trouble figuring out where the air control valve is located, is it the air inlet on the airbag? The airbag is brand new so I don't think it's the bag anymore. When I search I'm seeing the Y54 looks like the airbag?
Where would I place the multimeter probes to check the resistance of the valve mechanicals?
I recently had the rear airbags replaced. So chances are the cable was unclipped during installation and didn't click back when reassembled. My friend also tested the battery and thought it seemed ok still.
I replaced the battery and car seems to be running well again. The battery that was in the car was from Mercedes based on the stickers. And Carfax doesn't have record of battery being replaced. The car is a 2010 and I'm the second owner. It's possible battery was 13 years old.
I recently had the rear airbags replaced. So chances are the cable was unclipped during installation and didn't click back when reassembled. My friend also tested the battery and thought it seemed ok still.
I replaced the battery and car seems to be running well again. The battery that was in the car was from Mercedes based on the stickers. And Carfax doesn't have record of battery being replaced. The car is a 2010 and I'm the second owner. It's possible battery was 13 years old.
04-17-2023, 02:50 PM
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that explains it. It happens.
