02 S430 Air suspension drop down at night when is cold??
 

Hi,
I would appreciate any help regarding this issue.
I own 02 S430 and at night the rear of the car drop down. The car is with air suspension and when I start the car in the morning for around 2 min is reading low suspension. The display flashing red till the car rise up. There is a switch on a dash that I can press and rise the car even faster.
I've notice this last winter but after that when the weather improved everything was perfect. The whole spring/ summer/ fall the car never dropped down. For the last 4/5 days the overnight temp is around 12/15F and in the morning the car is slammed to the ground.
It is a vacuum/ air issue...any suggestions?
Thanks

Most likely a air leak at that strut.

Is not just one side, it is the whole rear, both sides. :confused:
Is there a way for me to check?

Get some Snoop and put on/around the connector at the top of the struts and see if it makes bubbles.

Will do :) Thanks

I couldn't find any leaks :confused:
Any other helpful hints?
Thanks

Hi there! I have a 2000 S430 with exactly the same problem. Last year, when temp gets to around 0 degree F, both rears would sit on the ground. When temp goes back to around 5 degree F, the problem would be gone. This year, when temp is around 8 degree F, both rear sinks.

I just replaced the suspension valve by the right front wheelwell. That did not fix the problem.

So I ordered 2 rebuilt rear struts today.

If anyone can help... between the suspension valve and each of the rear strut... is there only a continuous line between them? Or is there fittings that can leak?

Anyhow, I am so tired of this problem... every winter my Mercedes would not be driveable for a couple of weeks because of this problem...

Hopefully the rebuilt struts will solve the problem. I will get the struts next wed and I will let you know if that solves the problem. You might just need 2 rebuilt rear struts!

Wish me luck!

Please let me know.
Thanks

what happened when you replaced with remans?
 

Did the cold seather bother you still. It would seem odd that a leak would not get worse but only be active in the summer

Either an internal leak in the valve block OR external leak at the lines OR struts.

sho1sho1, did replacing the rear struts fix your problem?

Thanks,

David