Howdy all, just got the wife a 2008 GL320 CDI, with a few issues...

Ive owned/worked on German cars my whole life (now45), mostly Audi, VW and BMW, this is my first MB

looks nice, drives nice, good power, but the suspension deflates ONLY if I have the setting at Normal. if I put it into Raised mode, it can sit all night and not deflate.

when it’s in normal mode it doesn’t deflate at the same rate, sometimes it’ll take hours, sometimes within 30 mins, it’s sacked out. But for a couple days it stayed at normal hieght without sagging at all. Then I raised it up then back down. Then after that it started sagging again.

ive had it at a local shop twice and he replaced a blown front bag, but said the rears were good. I returned to the shop a few days later saying it’s still sagging in the rear. Just picked it up today, and he said there are no leaks?!?

drive home, look outside 45 mins later, and yup, rear is sacked out... cr@p

but why does it stay up when they are full pumped up?

Any ideas? Thx