S212 Air suspension

[frubpato]

i
Done a bit of searching on here and i think that my problem is leaking "airbags" but just wanted to check. the car goes down both sides at the same time sometimes over the space of a few hours sometimes (like last 2 weeks in an airport car park) it stays up. I cant work out if its is a mechanical or electronic problem . Could it be that if the suspension is partially loaded that the leak is sealed or is it that a sensor gives a "implausible" reading and the whole system deflates.
Anyone any experience - it is a 2011 E250 estate

 

[Uncle Benz]

The system on the 212 differs from the earlier 211. On the 211 if it sagged overnight it was always the bellows. On the 212 the switching is done at a common manifold, and leaks can occur there or from chafed pipes between. Strip off the plastic covers and arm yourself with a plant sprayer filled with water and a squirt of washing up liquid. If the pipework and plastic manifold are good it’ll be the bags, but be aware, chafed pipes are common on these

 

[bembo449]

surely if the bags were at fault you would have constant behaviour of dropping all the time , no ?

 

[frubpato]

Thanks - yup that was my thinking , I will go with the block behind the rear bumper first and see if there are any issues - seems to be a very dangerous position in terms of parking taps etc . Luckily Aerosus don't seem to be that expensive and the self help on here looks comprehensive if it does go that way