Another Airmatic issue (I haven't seen it here) Frozen Pressure relief valve?
Thread Starter
Super Member
Joined: May 2015
Posts: 600
Likes: 45
From: Minneapolis, MN/Breckenridge, CO
2010 E550 4Matic Sport P2
Another Airmatic issue (I haven't seen it here) Frozen Pressure relief valve?
C157300: The correction time while emptying is too long is the fault code on xentry.
I am glad I brought my star diagnostic computer along for the road trip to Colorado. That said, naturally, I don't have a shop to work in out here anymore.
Basically my front end raised up and will not lower. I can not lower the front end in star (and it is outside of the limits to recalibrate (30mm or so). This only happened when it was below freezing. I feel like I could hear the relay actuate, but the car will not lower in the front.
Is it possible that the pressure relief valve is frozen shut? Naturally the car is parked outside and the weather is COLD here right now. I'm trying to sort out what the potential culprit could be and how to fix it.
Thank you in advance.
I am glad I brought my star diagnostic computer along for the road trip to Colorado. That said, naturally, I don't have a shop to work in out here anymore.
Basically my front end raised up and will not lower. I can not lower the front end in star (and it is outside of the limits to recalibrate (30mm or so). This only happened when it was below freezing. I feel like I could hear the relay actuate, but the car will not lower in the front.
Is it possible that the pressure relief valve is frozen shut? Naturally the car is parked outside and the weather is COLD here right now. I'm trying to sort out what the potential culprit could be and how to fix it.
Thank you in advance.
Thread Starter
Super Member
Joined: May 2015
Posts: 600
Likes: 45
From: Minneapolis, MN/Breckenridge, CO
2010 E550 4Matic Sport P2
Ok.... so another question. Where exactly is the pressure relief valve in the w212? Can I get to it/access it/inspect it without removing a wheel? I presume it is in the rear quarter panel? Driver's side or passenger?
Thank you.
Thank you.
Thread Starter
Super Member
Joined: May 2015
Posts: 600
Likes: 45
From: Minneapolis, MN/Breckenridge, CO
2010 E550 4Matic Sport P2
Thank you. By any chance do you know if there relief are could be clogged/frozen? or that the valve block itself could be frozen prohibiting the front from lowering properly? I am going to try and find a heated garage for a night, but outlook isn't as good as I would like :/
Thread Starter
Super Member
Joined: May 2015
Posts: 600
Likes: 45
From: Minneapolis, MN/Breckenridge, CO
2010 E550 4Matic Sport P2
Update: I confirmed it was frozen.... temps for the day were in the high 30's..... I drove the car around for a while and it finally started to let the nose come down. I re calibrated it with STAR (which worked now that outside temps were warm.
I'm guessing there is moisture in the system. There appears to be a filter in the airmatic system. I have seen a video with someone disassembling the compressor to access and dry/replace the silica in a container. Is there another filter that would be easier to access? Or will I need to address both?
Thank you!
I'm guessing there is moisture in the system. There appears to be a filter in the airmatic system. I have seen a video with someone disassembling the compressor to access and dry/replace the silica in a container. Is there another filter that would be easier to access? Or will I need to address both?
Thank you!
Last edited by Abrown3mtg; Jan 13, 2016 at 07:12 PM.
