S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Front suspension

Old 07-04-2016, 02:08 PM
Junior Member
Thread Starter
Join Date: Jul 2016
Location: Washington State
Posts: 26
Received 0 Likes on 0 Posts
2002 Mercedes S 430
Front suspension

I am new to the forum and hope to learn all I can from the people that own and drive these cars. I just bought a 2002 S430 and am going over every item to check it all out. Each time I turn it on I always get the "No faults found" which is reassuring. However, after sitting over night, the front has dropped about as far as , I think, it can go. The rear has dropped some, but not as much as the front. When I start it, it gives me a message,"car too low, don't drive" or something to that effect. As the car sits in idle, it starts raising and in a min, the message goes out and the car is level. It will stay level all day and does fine.
I don't think this is normal and would like to find out what would cause this?
It must be a leak some where but how does one start looking for the leak?
bud1326 is offline  
Old 07-04-2016, 03:14 PM
Super Member
Jack_88's Avatar
Join Date: May 2016
Location: California
Posts: 506
Received 22 Likes on 22 Posts
2018 C300
I'm going to go on a limb and assume you do not have ABC. If that's the case, you have a fault with the air suspension, most likely a front strut. Does one side of the front seem lower than the other? I know for Audi's a leaky strut leads to a burnt out compressor from trying to keep up with it.
Jack_88 is offline  
The following users liked this post:
bud1326 (07-04-2016)
Old 07-04-2016, 03:47 PM
MBWorld Fanatic!
Join Date: Jan 2008
Posts: 5,066
Likes: 0
Received 179 Likes on 174 Posts
The leak is found by spraying soapy water on the struts and air lines

It may not necessarily be an external leak it might be a valve block leak that internally releases the pressure
tusabes is offline  
The following users liked this post:
bud1326 (07-04-2016)
Old 07-04-2016, 04:21 PM
MBWorld Fanatic!
Join Date: Dec 2012
Location: Acworth, GA (N of Atlanta)
Posts: 1,420
Received 92 Likes on 87 Posts
2003 S430
The compressor and valve block are in the right front wheel well, the reservoir in the left front. Plastic lines run from the valve block to the struts. The lines to the front struts are visible when you open the hood. The lines to the rear struts are under pop-off covers on the rear package shelf (inside, under the ends of the rear window).

One of the more common leaks is the diaphragm in one of the struts. Usual fix is to buy lifetime-warranted rebuilt struts from Arnott, or try to find good used ones.

This might give you more info on how the system works.
wallyp is offline  
The following users liked this post:
bud1326 (07-04-2016)

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Front suspension

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: