M-Class (W166) Produced 2012-2015

airmatic suspension

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Old Aug 23, 2018 | 03:26 PM
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ml 500 w166
airmatic suspension

hi all,
w166 ,2013 ml 500 , after a long night parking and on several occasions, suspension is very low on both front and rear left side suspensions , gets back to normal once started , no warning messages at all. any ideas that would help ?

Last edited by tartir; Aug 23, 2018 at 04:36 PM.
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Old Aug 23, 2018 | 08:23 PM
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Originally Posted by tartir
hi all,
w166 ,2013 ml 500 , after a long night parking and on several occasions, suspension is very low on both front and rear left side suspensions , gets back to normal once started , no warning messages at all. any ideas that would help ?
You have a leaking air strut and bag. Try using the soapy water test to see which one is really leaking
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Old Aug 24, 2018 | 08:02 AM
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ml 500 w166
Originally Posted by kombifan


You have a leaking air strut and bag. Try using the soapy water test to see which one is really leaking
thanks for the reply .my I know why do both suspensions go down if there is a leak in 1 only ?
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Old Aug 24, 2018 | 08:04 AM
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Originally Posted by tartir
thanks for the reply .my I know why do both suspensions go down if there is a leak in 1 only ?
also why it doesn't leak all the time? Sometimes it stays up for several days ?
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Old Aug 24, 2018 | 11:36 AM
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Originally Posted by tartir
also why it doesn't leak all the time? Sometimes it stays up for several days ?
What happens usually is that the rubber tends to wear out, which is usually based on a time thing and it is usually exacerbated if the car isn't driven regularly.
So if one goes, all the other ones are coming soon thereafter.


Why it sometimes leaks and sometimes doesn't, well that's usually because the leak is somewhere up in the bag or strut and as it folds over it either opens or closes the leak; which may explain why you sometimes do and don't have an apparent leak.



But do try the soapy water test to see which one and where it is leaking.
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