Airmatic drops front sometimes overnight or few days

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PeterQ
C Class
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Model you own: w116
Region: Western Australia
Location: Bridgetown

Airmatic drops front sometimes overnight or few days

Post by PeterQ » Thu 23 Jul, 2015 8:51 pm

My 1999 S430L Airmatic drops at the front sometimes, overnight or after a few days of non-use. I start it up, get the "Too low!" message and then the car pumps up and all is well. As a former 6.9 owner I'm sort of used to this behaviour (without the alarmist message on the dash), but I don't know if I should be worried in this case. I don't seem to have any leaks at the top of the strut.
So, should I worry/panic yet?
2003 CLK500 convertible, latest successor to:
2006 W164 ML350 - 1999 S430L - Audi A6 C5 V8
Holden Crewman Cross 6 - Ford Territory - Holden Commodore VZ 6 speed Ute
Mercedes 450SEL 6.9 - Ssangyong Musso 3.2 - Mercedes 450SLC
and a litany of others...

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John Green
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Re: Airmatic drops front sometimes overnight or few days

Post by John Green » Mon 27 Jul, 2015 12:53 pm

Hi Peter, whilst what you describe is not ideal, so long as it comes up quickly I would not panic too much. Many $$$$$$$ in parts will only allow you drive away a few seconds quicker.
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PeterQ
C Class
Posts: 26
Joined: Mon 26 Jan, 2015 6:18 pm
Model you own: w116
Region: Western Australia
Location: Bridgetown

Re: Airmatic drops front sometimes overnight or few days

Post by PeterQ » Tue 28 Jul, 2015 9:15 am

Well I took a look at a few things last weekend, nothing obvious. But, the infamous relay is not the "bad" Siemens nor the "good" Hella, but a Tyco. Hella replacement coming, just in case. Tops of struts are very clean and appear intact. I found a bill for "replace right front shock - supplied" from December 14, so this weekend I'll start spraying joints in that area with soapy water looking for bubbles. Could just be a joint not quite sealing. This is like my old 6.9, just not so oily. On the other hand, the oil made it easier to find the leaks.
2003 CLK500 convertible, latest successor to:
2006 W164 ML350 - 1999 S430L - Audi A6 C5 V8
Holden Crewman Cross 6 - Ford Territory - Holden Commodore VZ 6 speed Ute
Mercedes 450SEL 6.9 - Ssangyong Musso 3.2 - Mercedes 450SLC
and a litany of others...

User avatar
PeterQ
C Class
Posts: 26
Joined: Mon 26 Jan, 2015 6:18 pm
Model you own: w116
Region: Western Australia
Location: Bridgetown

Re: Airmatic drops front sometimes overnight or few days

Post by PeterQ » Wed 05 Aug, 2015 9:24 am

So I replaced the Tyco relay with the preferred Hella, not expecting it to make any real difference, just a peace of mind thing. But now it's not dropping so much - still does it but not enough to get the "Too low" display.
Please explain.
2003 CLK500 convertible, latest successor to:
2006 W164 ML350 - 1999 S430L - Audi A6 C5 V8
Holden Crewman Cross 6 - Ford Territory - Holden Commodore VZ 6 speed Ute
Mercedes 450SEL 6.9 - Ssangyong Musso 3.2 - Mercedes 450SLC
and a litany of others...

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