pierrejoliat

Yes Surya, those look like my '07's my '03's were very similar, when they are working correctly, these suspensions are light years ahead of the coil and shock systems, the hydraulic system I have little exposure to past my buddy had one and the ride was good, but not the floating down the road feel of the airmatic. So, you have four shock/air suspension components, a valve body, a air compressor and an air tank, two front height sensors and one in the rear, plus all the airlines connecting it all, then the option of selecting ride heights on the dash and speed sensitive ride height as well, the faster you go, the lower the ride height, so there's a lot going on. For me, on the '03, first I blew out a rear driving over roadwork/ pot hole,sounded like a gun shot, so replaced both rears and the compressor, then the valve body shortly after, then it was fine. The '07 was a different story, one part after the other, three trips for reprogramming and going low overnight, new lines, struts valve body, more programming, Ugh!

Edit; I forgot, the headlight aiming and the door locks are also affected/controlled by this system as well and the car self-levels when parked and part of the overall reset procedure is called the Mercedes airmatic "rodeo"

yayaz23

I also forgot to mention that when I start the car I hear the pump in the rear then as soon as the pump stops the malfunction appears on my cluster everytime.

S-Prihadi

Aha....got it, thanks so much my dear Sir
Looks like electronic gremlins could also be Uncle Murphy favorite gift for your 2007...
Actually there are 2 of S-Class his belated daddy has, a 2001 and the 2008, naturally I will prefer 2008. 2001 the airmatic has "sunken", I do not know the actual cause yet and I do not want to know hahahaah

pierrejoliat

No, you don't want to know! HaHa, if he has the massage seats, those are hooked in too! On both cars, the first thing that broke was the door locks,which also operate the air-close doors! I had to change those out on the front doors in the '03, which will be similar to his '01. If those are still working, DO NOT slam the doors or trunk, just close them very softly, then they will close themselves, very complex air system, also the trunk and trunk handle is soft-close, so hooked in to the air system as well

S-Prihadi

Yes yes....I seen the soft closing door. Wah....so much things to worry

yayaz23

things kinda jumped off topic. Any suggestion with my issue?

pierrejoliat

Did you try the battery reset? Pump should only run for like ten seconds on startup, any more and you have a leak or the pump is going bad, you must trace the airlines from compressor to struts spray with soapy water to find leaks, if your car can set ride height, set it all the way up and spray the air bags themselves and fittings, you may also have a malfunctioning valve in the valve body, not fully opening or closing, this is not an easy system to diagnose, could also be one of your ride height sensors is bad or out of parameter and needs resetting.

yayaz23

I haven’t tried the battery yet but I will right now. The compressor does come on for about 10 seconds and literally as soon as it shuts down the malfunction pops up. Like I’ve mentioned before my car sits perfect and there’s no leaks that I can see because doesn’t sag at all anywhere. I had the front left air strut replaced and as soon as that was done that’s when the malfunction appeared and I can’t clear it for the life of me. I had the car calibrated and all levels are in check. The mechanic that cleared the code said everything was fine then I start it up and bamm there’s that damn malfunction. I can drive the car without a problem but that malfunction is annoying and it won’t allow me to raise or lower the car.

Arrie

It might be problem with the air tank pressure sensor. I don’t know if there is a separate pressure sensor on the tank or if it is built-in with the compressor but I would look into that.

yayaz23

ok thx I will check it out. I know there’s a relay next to the tank but don’t think it’s for that tank.

pierrejoliat

Surya, can you or some other nice person look up this fault code? Airmatic fault code C155664.

yayaz23

Stored fault codes: FC: C155664 The compressed air sensor for system pressure has a malfunction.

S-Prihadi

yaya,
Do you have a proper scanner able to read all sensors and modules on the airmatic and do actuation/bi-directional ?
The DTC is about pressure sensor and its easy to verify if value is weird, if you have the scanner I speak of

S-Prihadi

This wiki is very good. Airmatic basic system does not change much except refinement in the valving between W220 era and today.
So if you read well, this wiki : https://w220.wiki/Airmatic
and that video I posted few post ago.......... you will have a VERY good understanding on how it works, hence I said it is easy, except when the computer/software side is the bad one and
erratic intermittent.

By action and reaction current to your airmatic, I would say when you scan the pressure, it is either short circuit or too high a pressure.

I do not know if today in 2023 this statement is still true or not : ( from W220 wiki )


Note that with all new Arnott AIRmatic struts you lose the electronic damping feature. While the new Arnott struts allow to plug in the original wire harness from the car, it simply fools the AIRmatic computer in to thinking the selective damping is functioning. In reality it is not and the shock has constant damping setting corresponding to OE "comfort/convenience" setting ("sport 1" and "sport 2" damping settings are not available).

Re-trace your repair timeline and see where does arnott comes in ?