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Alright so I finally got around to popping the sensor off of the vehicle. The part # is 0045429918. What's strange is that all the MB parts websites don't list the E63 AMG for fitment. They list the E550 and CLS63 but not the E63. Doesn't make sense. I should just go ahead and buy it correct?
yep ... seems it's used in many of the Benz models
apparently it’s an interchange number for the newer one that the dealer websites list. Funny thing is that they don’t mention it. But some of the eBay listings do. I ended up ordering a brand new one on Autohaus AZ for $26. The wiring and hardware shouldn’t be the cause of my issue, just the sensor.
Argh, replacing the rear right sensor did not solve the issue. It's intermittent. Some drives, the light doesn't pop on and the suspension setting button works. Other times, it will come on and the button quits working. Just did my alignment and the steering wheel is straight. Will an Autel give me a more detailed breakdown on the code and what component is having this issue? I mean as I said, it’s intermittent, perhaps wiring?
Wow so I finally found out my issue. Re-scanned with the Autel and here is the error it returned:
Clicking further into shows voltage values on each level sensor. The rear ones had parallel values but the fronts were way off between one another despite being on a flat surface. Crawled underneath the car and was absolutely shocked at how loose the u-bolts holding he sensor arms to the tie rod on each side. Easily could wiggle them and the Autel showed the voltage fluctuation.
So bingo, found my smoking gun. It would explain the intermittent nature of the error and the implausible reading by the Autel. The sensors can never provide the same reading between another because they’re always moving, even on relatively smooth surfaces.
So I was at my BiL’s when we did the diag. He’s gonna come to my place where I can park the vehicle inside my flat garage and make sure the values are correct before tightening everything down. I’m 99% sure this was the issue as the code goes away once you park and turn off the vehicle. Start it back up, everything is fine. But then start driving, hitting bumps and taking turns and it will appear after a couple of minutes. Basically cannot get that plausible reading after trying to for that given time and therefore statically sets a certain ride height and locks you out of the suspension button. So I’ll report back once we tighten everything down and wait a few days to confirm 100% that this was the issue.
When scanning, it pops up as a stored code. The way to catch it in the act is to clear, leave the Autel attached, and do a live read while driving. Then the code comes back and boom you can go read the live values of the voltages.
So you didn't notice this sensor was loose when you replaced the actual sensor?
I replaced the rear sensor. There was nothing wrong with it. Previously, when replacing that one broken front sensor arm, I noticed that the front sensors were loose but thought that was part of the design since both sides are like that. And truth be told, would have never assumed differently until using the scanner and seeing live how the values were fluctuating all over the place when wiggled around.
ETA: and boom! Tightened up everything and went for a long spirited drive. No more suspension fault! Talk about a journey lol. Thanks for all the help everyone.
ETA: and boom! Tightened up everything and went for a long spirited drive. No more suspension fault! Talk about a journey lol. Thanks for all the help everyone.
Priceless info here thanks .Have this exact issue with the same symptoms , after replacing the common front lower control arms . Found my issue to be one of the front level sensors , somehow was in more of a 6 oclock vertical position . Readjusted to 10 o'clock to match the opposing side . Code has not returned & all values are in sync now.
Last edited by SilverE5588; 03-19-2023 at 06:22 PM.
ETA: and boom! Tightened up everything and went for a long spirited drive. No more suspension fault! Talk about a journey lol. Thanks for all the help everyone.
Just lowered my car with RENNtech springs/perches (likely rebranded springs) and their rear links. Having this EXACT same intermittent issue now with the air-matic malfunction. Thanks for posting this journey. I'm going to check the front sensors next!
after replacing front lower control arms, plastic headlight level sensor arm on right side was pushed too far onto/off the lower ball - wedged between ball and bracket (area circled in diagram below) and was binding uncomfortably - placed arm back onto the ball where it's rotating freely again - lights and vehicle level are back in spec, no more wonky....
after replacing front lower control arms, plastic headlight level sensor arm on right side was pushed too far onto/off the lower ball - wedged between ball and bracket (area circled in diagram below) and was binding uncomfortably - placed arm back onto the ball where it's rotating freely again - lights and vehicle level are back in spec, no more wonky....
10-18-2022, 04:59 PM
