W212 estate rear suspension dropping

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paul_f

Active Member
Joined
Mar 26, 2007
Messages
151
Location
Chatham, Kent
Car
2012 W212 E350CDI Estate and 1966 VW Splitscreen camper
My 2012 estate drops in about 30 minutes to the bump stops at the NSR, OS is fine.

When I start the car it raises back up in about 30 seconds.

I thought it would be the air spring, so I removed it but there isn't an obvious leak when i inflate it off the car using an airline. Also there was still air in it when I removed the airline.

Anyone had the valve block fail? I have put the air spring back on, and will check all the joints with leak spray again
 
Found the problem, air line has cracked near one of the cable tie restraints.
 

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