I have an issue & I dont see where others have had this issue. My driver's side (left front & rear) is all the way down on the tires. It is this way driving or parked. Sometimes driving it, it will come up but it's not at the normal lowered height. It is higher & you can feel it has that swirly feeling. I have lowering links on it. The red do not drive message will pop up a couple times but I turn car off a couple of times & it goes away then doesnt come back but car is still "tuna boating". I have a iCarsoft MB scanner. These are the codes I am getting c1124, p112401, c1136, p113602, c1134, p113402, c1133, p113302, c1132, p113202. The C1124 is abc longitudinal sensor which I have had since I bought the car a few years ago. So I dont think that is it. The other codes have to do with each corner of the car level sensors. I cant find info on the "p" codes though. I highly doubt all 4 level sensors went bad at same time. Anyone had this problem before or possibly knows what is going on here?

Oh I forgot to add that when I push the button to raise the suspension, only the passenger side goes up. Driver's side (front & rear) stays collapsed onto the tires.

 

Sounds like the valve block is hooped on the front end.

R.K.

 

I have been reading a lot in past couple of days about this setup. At first I thought the valve block but from what I read about the block is either the front will go down or rear go down or the entire car as the fluid leaks to the other side. By what I mean about the other side is the valve block is divided into 2 sections. One section does the front end & the other does the rear end. Is this correct? I think I read you will get code for low pressure too for leaking entirely valve block. The only codes I get are for all 4 level sensors & b24/14 longitudinal acceleration sensor. I seen the real time pressure on my scan tool & I think off the top of my head it said pressure was like 176 or 178. I have studying the system a lot online for past couple days & I just can not figure out how the just left side front & rear would go all the way down. The passenger side is at normal height. When you hit the raise button on dash only the right side raises & lowers. Left side never moves... 😫🤬

That's why I figure it is not the valve block & made this post. If I am wrong can someone please break it down for me to help me understand? I also suspected the accumulators too but that didnt seem right either. It's so frustrating. I asked the service desk at local Mercedes dealership when I was picking up some clips I ordered. Service desk guy wanted to tell me my driver's side has an leaking air strut. Lol. I tried to correct him but he continued to argue with me that my car has air suspension. I told him I recently changed the filter on my HYDRAULIC suspension. Then he proceeds to tell me "oh, well yeah you probably have the 1/2 hydraulic & 1/2 air suspension but he knows that I have air struts on my car." Take a guess at who is never gonna touch my car?... 🙄

 

As far as I remember there are two valve blocks; one for the front and one for the rear. It sounds like one of your front side lines are passing allowing the one side to drop.

R.K.

 

My 05 cl55 did the same thing. Driver side front & rear would drop over an hour of time after parking. Powered up and 70% of the time came back. Sometime like you I had to cycle the ignition. Worst case I used the raise and lower button to get back to drivable height. Drove fine and came back relatively easily after dropping so I never fixed it. Was diagnosed by MB west covina as a valve block FWIW.

 

Make sure your lowering links are still in one piece. I've had quite a few come in with lower quality links that popped off. If your iCar soft gives you actual values then check what the vehicle level is reading. If the side that's lowered is reading high then there is an issue with the sensor or linkage and the module is constantly trying to bring that "high" side down to the calibrated level

 

Thanks for all the help. I finally got around to jacking it up & taking a look at the suspension. It turns out where my front driver's side lowering link attaches to my aftermarket adjustable upper arm (that lil ball attachment) unscrewed itself & the arm was just tangling around under there. Everything was still there, I just had to screw it back into the arm. This time I put some thread lock on it to hold it on better. All is better now. Once again thanks everyone for the help. But it is still kind of weird though that one arm fell off but the computer gave codes for all 4 level sensors were bad & why it lowered the rear driver's side down all the way too as well...

 

Its kind of hard for the car to stay up on 3 corners and down only on one when it is lowering it to the max trying to compensate for what it is reading as a very high ride height. It's normal for the whole side to come down, it would be both fronts but on ABC cars they aren't tied together with a sway bar. The sensor may have been in a position so far off as to hit the max level making the computer think it is shorted, all level sensors are supplied power from the same chip on the circuit board so it is possible it just cut power to the sensor seeing the fault which results in fault codes for all 4

 

Glad it was something simple.