dblnikel

I hope someone has the answer to this one because I am lost. The car icon with an up arrow(visit workshop) appeared for the second time tonight. The first time I saw this malfunction was about a month or so ago. It was an extremely cold night when I was driving and all of a sudden the malfunction appeared. I looked at the car and the rear suspension had given out. I parked the car and let it be till morning. The next day I started the car and all was good, like it never happened.....the rear came back up and the malfunction was gone.

Now tonight I was driving home from Philly and it appeared again. I pulled into a rest stop and nothing was noticeably wrong with the suspension. I turned the car off then back on and the malfunction was gone. Once again the car feels fine.

Does anyone have a clue as to what it may be that is causing this to happen? I just got AAR links but am scared to install them because of this small issue. I think it may be a relay or sensor but better safe then sorry. Has anyone else experinced this and have an idea to what it is???

Blacksport350

Not sure exactly what is going on but I wouldn't install the links on the car until you figure it out. If it were my car, I would never instal the links and get an ELM or lower through STAR as this is the correct way to lower our cars(IMHO).

Yacht Master

Sounds like you may have a compressor or compressor relay problem.
Dose the car leak down over night?

BTW ELM is the preferred method to control ride hight.

dblnikel

No the car never lowers itself over night. It is a mystery because everything is normal. Even last night when the malfunction appeared nothing was noticably different. I think it really might be a relay or something. Can't be anything major if not there would be signs. I hope someone else has experienced this so it will make everything easier.

novae500

i got the same icon warning 2 wks ago. Took it to MB dealer and it was a bad wiring harness. Invoice detail by Tech was tested for voltage on compressor, airmatic release valve( showed no voltage going to it) pulled apart and saw black/red wire bad no voltage. Replaced cable wiring harness. Test drove and no icon and ran fine.

dblnikel

Thank you for the tip. Where is te harness located? Was it a big job?

novae500

Tech checked the DS front suspsension and took something apart to see the bad harness. I dropped it off and picked it up the next day. done under CPO warranty so no charge. Time was .50 hrs he charged on the invoice.

dblnikel

Thanks for your help. Now I have a direction on this.

adelekem

dblkikel,

Did you figure out what the problem was? Mine is doing the same thing. The raise and lowering is fine and the car does not lower itself overnight.

I had it hooked up to STAR and this is what it said:

RECOVERY TIME DURING FILLING OF THE CENTRAL RESERVOIR IS TOO LONG
POSSIBLE CAUSES & REMEDY:
- CHECK FOR POSSIBLE LEAK IN PNEUMATIC LINE BETWEEN COMPRESSOR AND CENTRAL UNIT AND CENTRAL RESERVOIR.
- PNEUMATIC TEST OF COMPONENT A9/1 (AIR COMPRESSOR UNIT)

Since I live here in Guam, there are no authorized MB dealers here so this local shop has the monopoly of all European cars here. They really didnt give me a resolution. They want to 'manually' check the air lines and then if nothing, replace the compressor. Please give insight to your scenario. It might be similar to mine. Thanks