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One again I am reaching out to the W211 guys for assistance. You guys are the masters of the M113k motor and have assisted me many times with my SL55. Unfortunately, you guys seem to be the masters of AirMatic as well. I have an AirMatic issue with my ML. I would post an ML thread, but it would get like three hits in a week.
The other day, I got the fun little "Airmatic visit workshop" message (in white). Here is what DAS/Xentry found:
Obviously, I need to replace or rebuild the compressor. I plan to install a new relay and also an air filter. Are there other components I should consider while I am working on this project?
I should note, the car never sags even after sitting for days and days.
Since we exchange PM. I know you did see my topic about compressor rebuild.
Don't overlook drier drying
The car might not sag empty, but once you put some heavy load in the trunk, you might start getting red warnings. That what happen on my wagon.
Your compressor sounds much louder than mine. I can barely hear mine inside with engine running.
So the point is that you might have other parts wear out, beside the ring that is easy to replace and you will not know that till you take it apart.
Hopefully you have another car to drive if getting the parts takes few days?
Or big check book to go to a dealer. ...
I do have another car. The ML is pretty much my daily during the winter. Completing a repair at home and beating the stealer out of a big repair bill puts a smile on my face.
although i'm not highly versed in this...have you monitored your compressor after your car has been shut off?
my E63 did something i never knew it would do, but as i raised each side of the rear to swap tires, i heard the compressor kick on for each side. id assume to add in more air to the tire that is still on ground to prevent sagging.
along with that, you then could proceed to use soapy water to search for any small air leaks
although i'm not highly versed in this...have you monitored your compressor after your car has been shut off?
my E63 did something i never knew it would do, but as i raised each side of the rear to swap tires, i heard the compressor kick on for each side. id assume to add in more air to the tire that is still on ground to prevent sagging.
along with that, you then could proceed to use soapy water to search for any small air leaks
I have not monitored the compressor when the car is shut down. I know what you mean about the cars doing stuff on their own. I swear sometimes when I am not in the garage, the SL and ML have discussions. I hear noises, open the door to the garage, and nothing.
I am hoping the fact I have experienced no sagging that there are no air leaks. I also think it is possible an air leak would trip a code. I will replace the pump, filter and relay and hope my problem is solved. By the way, there must be gold dust or something in those filters. I bought a OEM filter today at an online discount site I like. The filter cost 154 bucks.
The $154 compressor filter must be ML thing.
I paid +- $10 for one fitting E
I did not like the design putting the originally fuel filter in reverse. In old filter the elements inside shrank, allowing dirty air to bypass them.
But with different ends I could not reverse the new one.
The $154 compressor filter must be ML thing.
I paid +- $10 for one fitting E
I did not like the design putting the originally fuel filter in reverse. In old filter the elements inside shrank, allowing dirty air to bypass them.
But with different ends I could not reverse the new one.
This is what I have to buy.
I guess a little bit of air line and a cheap looking bracket took the price way up. Autohouse of AZ is selling it for $187.
I would not be shocked if the filter is actually the same as the E.
I wasn't sure and did not want to take chances so I already bought everything I need (hopefully). Appreciate the heads up though. I will spend more time researching next time. I gotta get the ML up and running so I can pull the boat. We don't get too many months of good boating weather up here in the middle of nowhere.
Got the new compressor in over the weekend. I am not sure what it is like on an "E", but changing it on an ML is a pain. The WIS says to remove the front fender liner which is a must. Even with the fender liner removed, access is limited. I ended up removing the front engine plate to try and get a bit of extra room. Still the access was tight. If I had hands of a 4 year old, I would have been set. The job clearly would have been somewhat easier if the car would have been on a lift instead of just jack stands. Nevertheless, patients and taking my time worked for me.
I had asked if anyone had suggestions as to what other parts should be purchased to do the install properly. After doing the job, I would recommend including new bushings and possibly springs for the three main compressor mounts. The rubber bushings were showing some wear and the rubber was degraded a bit possibly from road crap including salt. If you live in a southern clime the bushings may look better.
Once I got the compressor in, I replaced the relay per WIS. The relay is cheap and it just makes sense to change it. DAS was very helpful and simple with the initialization process. Also, testing Airmatic components is a breeze with DAS. Just for kicks, I did the DAS compressor test. If I remember correctly, DAS expects the compressor to build a given pressure within 30 seconds. My old compressor failed. The new compressor built the given pressure in about 3 seconds.
The test drive was uneventful and no faults occurred. Fingers crossed that I won't be dealing with Airmatic issues for a while. Now I need to take a look at that slightly leaking rear main seal. Not looking forward to that one.
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I have an AirMatic issue with my ML. I would post an ML thread, but it would get like three hits in a week.
