604benz

My suspension malfunction light has been coming on in the dash on and off for the last few weeks, all 4 struts are the same height and suspension rise works. I dont have a fuse chart does anyone know where the fuse and relay are located. Anybody else had this experience.

cool_lagoon

your pneumatic pump is about to go, have it check out and use a star diagnosis computer to test.

new550

My light has come on a few times, each time, the 40 amp fuse related to the airmaitic system was blown...replaced that fuse and all was fine....however, mine would not rise while fuse blown, sounds like your issue may be different...but it can't hurt for you to check that fuse?

cool_lagoon

Don't get confuse with other suggestions cause if your fuse is blown your car will be dropping so low and or the suspension pump will not be functioning at all, no more air will be pumping into the individual struts.

To reset, shut off engine for a few minutes, close door, step on brakes and start engine and wait for a few seconds before moving to Drive gear.

Lucky are those who listens and take our opinion seriously. We and a few senior members are actually enthusiast who owns dealerships or shop or in fact we are seriously knowledgeable facilitator and we do it for free to help the rest of the members save some precious dollars.



JUST GO TO A SHOP WITH A STAR DIAGNOSIS COMPUTER AND LET THEM CHECK OUT THE SYSTEM.

cool_lagoon

new550 if your saying you replace the fuse then which fuse number is this and where is it located?

604benz

Thanks for the info Cool Lagoon.

new550

The 40 amp fuse I have replaced is fuse number 56 (labelled "Airmatic" in the fuse list/table). It is located under the hood next to the brake fluid reservoir on the drivers side. There are 4 hex head screws that hold the cover in place and need to be loosened to access the fuses.

(I was on highway during a long a trip when this first occurred and discussed the situation with two dealers via telephone from a rest stop. One recommended that I check this and that was indeed the issue. I would not offer advice if: 1) I didn't have experience or understanding of same or similar issue with my 2007 s550 and 2) It had not worked for me. I agree with cool lagoon that the some very good people are here to help, but I also think many of us have experienced same or similar things with these cars and try to help others, even though we may not be experts or own dealerships.

cool_lagoon

Post what ever happen after your diagnosis so others can also learn from this experience. Good Luck

604benz

I just checked the height of all 4 struts again and the rear passenger side seems 1 finger lower than all the others, could this be a sensor or leaking strut. I just had my rear bumper painted a month ago could they have disconnected something while the bumper was off and not properly tightened it back on.

RT2010

I have the same problem. Amber Malfunction message pops up when I drive and I click "OK" button on steering to dismiss it. No other functional / mechanical issues have been noticed as yet.

Will be curious to see what other find.

604benz

Rechecked the height in my garage on straight flat surface and all 4 struts are even, also had my Mercedes Mechanic check on star computer and seems compressor is not pumping at full rate, so he suggested to keep on driving until compressor gets worse.

cool_lagoon

604 benz your mechanic must have been a good man for giving you a sound advice, wait till the pump is not working then replace is a prudent way a good mechanic will want to do things, in the event you should decide to change you pump please do not throw away your old pump, just PM me.

604benz

Dealer wants around $500 for new air compressor, any one know another place to buy one.
Cool Lagoon i'll pm you after i replace mine.

marthyh

Check for air-leaks before throwing parts in ?

604benz

My mechanic told me the car would be slammed if there were any leaks as it sits for days when i am out working.

604benz

Does anyone know the part # for the airmatic pump for S550 w/o abc.

cool_lagoon

part number 221 320 1704 and the valve block 212 320 0358 for car that does not stand evenly it might just be the valve block which distributes the air to the strut may not be working properly, 604 where you able to fix your car's ari suspension issue?

Yuille36

These cars are smart, and will diagnose themselves, so when it tells you something you should heed the warning. There is a issue with your system, from a bad strut or shock, to air compressor, distribution black, and frayed air lines. it's anyones guess, until a tech has looked at it.

604benz

The air pump just arrived, i got it off ebay for $180 plus shipping.
My Mercedes tech will install it in a few days when he has a day off work, he does jobs from his home on his days off.

cool_lagoon

604 would you kindly post a picture of the air compressor and the valve block?

604benz

Attachment 244219

Thats the compressor, i did'nt need a valve block

cool_lagoon

the most commonly overlooked part that causes vehicle with air suspension not to function properly

jett3jett

got the Malfunction light on the dash so i replaced relay, compressor, and fuze yesterday @ total of 913.00 with labor & tax included @ my local MB. Thought it was a simple relay problem but i needed the whole setup

Popcorn354

Malfunction symbol on my car just came up, does anyone know a good mechanic in the north Nj or Nyc area that's reasonable with price and does good work??? Please pm me

Nickthegreek

If the air compressor does not end up solving the issue, then the line connections at the valve block and strut need to be checked. There is a TSB out on that




Vehicle sinks at right rear wheel after standing for a long time (longer than one day).

Topic number LI32.22-P-048772

Version 2

Design group 32.22 Air suspension

Date 02-18-2010

Validity MODEL 221### #A 277 455 up to 221 ### #A 315 897 without SA code 487 (ABC)

Reason for change Note on parts availability deleted

Reason for block

Complaint:

Vehicle sinks at right rear wheel after standing for a long time (longer than one day).

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Attachments

Cause:

Score mark in pressure line for right rear air suspension strut leads to gradual air loss. Compressed air escapes at connector of pressure line on valve unit or at connector of air suspension strut. (See picture "Anschlussstueck.jpg" in attachment).

Remedy:

Check connector of pressure line on valve block and connector at suspension strut for leaks using leak detector spray. As the score mark in the pressure line runs along its entire length, a sectional repair will not be successful. If leaks are detected at one of the two connectors of the pressure line, the entire pressure line from the valve block to the right rear air suspension strut must be replaced.

Important:
Please do not perform any other repair attempts or replace any components such as the suspension strut, compressor or valve unit.

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Symptoms

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Parts

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Work units

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Validity

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Attachment - Leakage at connector of air pressure line to valve block or leakage at connector of air pressure line to air suspension strut.