I've got a 2019 S450 and have been hearing a ticking/knocking sound coming from the front left suspension every time I start the car up and the air suspension raises. It can be replicated by pressing the "raise" button as well. Brought it to two different dealers and they both said it is "normal" and happens to other similar cars with the Air Matic. Am just wondering if any one here has the same issue as well? It's not a very pleasant sound and is actually quite annoying so I doubt it could be a "normal" feature.

Thanks in advance!

 

i have a 2020 and recently got out of 2017 S. I wouldn’t say knocking/ticking, but you can definitely hear the airmatic raise and release. Not sure I’ve ever heard a ticking noise though. Have the dealer pull out another out and duplicate it.

 

Thanks phillyreem, will ask them to demonstrate it tomorrow on another S.

 

I've had a few of these cars, sounds like something is not right, it is not a bad sound as you describe but more of a buzzing sound when the air compressor is running and then a click when it turns off.

 

Mine is light a "knock, knock, knock" sound as the suspension is raised. And when moving off slowly when cold it seems to be at a greater intensity. But it does not make any sound at speed or after driving for a couple of minutes.

 

Hi ! I have recently experienced the exact same problem.Have you identified what the issue is ?

 

Maybe one of the bushings holding your compressor is bad.
That may explain the knock sound, the compressor vibrating metal to metal….
let us know.

 

Sorry for bringing this thread again to life. I had the same issue. Did you figured it out ??

Please update us if you do so.
Thnx.