2011 S550 Aromatic Malfunction yellow light
Thread Starter
Junior Member
Joined: Mar 2016
Posts: 23
Likes: 1
From: Manhattan Beach
S550 E350 C300c
2011 S550 Airmatic Malfunction yellow light
I saw a lots of great informations, figure I'll ask it here. Hope I come to the right place. :-)
My 2011 S550 (48000 miles) displays the yellow Airmatic "Malfunction" with an up pointing arrow after the car parked over night, sometimes, not always. This has been going on and off for over a year now, the dealer checked it 14 month ago, said "5111 Aromatic Pressure Sensor Implausible." and there's a "Loose connection". "Secured Connection and Fault Code Gone".
After a few months, it started to happen again.
Here're the 3 situations:
1) Both front suspensions are about 1"~1.5" lower than normal after parked for a while.
If the front doesn't lift up after engine starts, the "Malfunction" displays.
(But after a 10~20 minutes drive, AND restart the engine, it lifts up and "Malfunction" display off.)
2) Front is 1" lower after parked a while, but if the front suspension starts to lift up after engine started, there's no "Malfunction" display. (I step out the car and watch it lifts up)
3) Sometimes the front didn't drop down that 1" even over night, and no "Malfunction" will display after engine starts.
Here're two questions:
a) What could be wrong with the warning display? (Situation 1)
b) Does the front suspension supposed to lower about 1" after parked for a while? (Situation 2 & 3, which one is normal?)
Any help would be highly appreciated.
Best regards.
ps, sorry for the "Aromatic" by the automatic spelling correction.
My 2011 S550 (48000 miles) displays the yellow Airmatic "Malfunction" with an up pointing arrow after the car parked over night, sometimes, not always. This has been going on and off for over a year now, the dealer checked it 14 month ago, said "5111 Aromatic Pressure Sensor Implausible." and there's a "Loose connection". "Secured Connection and Fault Code Gone".
After a few months, it started to happen again.
Here're the 3 situations:
1) Both front suspensions are about 1"~1.5" lower than normal after parked for a while.
If the front doesn't lift up after engine starts, the "Malfunction" displays.
(But after a 10~20 minutes drive, AND restart the engine, it lifts up and "Malfunction" display off.)
2) Front is 1" lower after parked a while, but if the front suspension starts to lift up after engine started, there's no "Malfunction" display. (I step out the car and watch it lifts up)
3) Sometimes the front didn't drop down that 1" even over night, and no "Malfunction" will display after engine starts.
Here're two questions:
a) What could be wrong with the warning display? (Situation 1)
b) Does the front suspension supposed to lower about 1" after parked for a while? (Situation 2 & 3, which one is normal?)
Any help would be highly appreciated.
Best regards.
ps, sorry for the "Aromatic" by the automatic spelling correction.
Last edited by StephenW2016; Mar 21, 2016 at 11:14 AM. Reason: More information
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
Likes: 253
Aromatic? Lol. That actually is an option on the w222. And an autocorrect brain fart feature on your posting device 
Now on the airmatic (not to be mistaken with aromatic) issue- you have a leaky shock or valve body. If it goes down some times and not others I imagine it is a valve body but that is rare. It could be also a snesor that acts up on occasion.
If car is throwing errors it needs to be read
Now on the airmatic (not to be mistaken with aromatic) issue- you have a leaky shock or valve body. If it goes down some times and not others I imagine it is a valve body but that is rare. It could be also a snesor that acts up on occasion.
If car is throwing errors it needs to be read
MBWorld Fanatic!
Joined: Mar 2008
Posts: 1,230
Likes: 32
From: Vancouver, BC
CLS55 AMG
your car should not drop while it's sitting. this indicates a leak somewhere. Could be a leaking strut, valve body, line, etc. If you still have warranty, you need to get the dealer to diagnose it asap. This problem can get expensive in a hurry...
here's a good article for you to read
http://www.import-car.com/mercedes-b...c-suspensions/
here's a good article for you to read
http://www.import-car.com/mercedes-b...c-suspensions/
Thread Starter
Junior Member
Joined: Mar 2016
Posts: 23
Likes: 1
From: Manhattan Beach
S550 E350 C300c
Thank you guys for your advises, I had it checked by the dealer and it was the faulty valve block sends signal to the Airmatic control unit and makes it look like the control unit was at fault. Dealer had to put in a new control unit to test/read it, then switch back to my original unit after they replaced the valve block. At lest that's what the service adviser told me.
$520.65 parts and $328.88 labor.
$520.65 parts and $328.88 labor.
Last edited by StephenW2016; Apr 11, 2016 at 06:17 PM.
