My suspension, is this normal?
 

My 2007 e70 rear suspension would sink down after a couple of hours parked. However right when I press the unlock button and open my door, the suspension would go back to normal and makes a buzzing noise. Once it levels itself and the buzzing sounds stop it looks normal again. Should I go to the dealership and tell them about this? Or is this normal. It only does this when it's parked, the only thing that sucks is when I'm in a hurry I have to wait for the suspension to raise up or else I will bounce everywhere on the road. So what do you guys think happened?

leak in the airline somewhere.

So should I go up to the dealer and tell them that?

Yes. Especially if you're under warranty

Sounds like you have 3rd row seats because I have the self-leveling rear suspension as well. Mine will make a hissing noise when I go to open the door (using Comfort Access) but it doesn't really adjust that much (at least not like you are describing).

Yes, you have the auto levelling suspension based on what you are describing. It should not completely deflate like that when parked. Mine doesn't do that.

Yes I do have 3rd row seating. This issue started 2 weeks ago and great thing I purchased the extended warranty. Ok thanks guys.

I have the hiss as well but don't have 3rd row / auto-leveling suspension. Think that's somewhat normal for all E70s.

Interesting I would have thought it was only for those with the 3rd row option.

I know that hissing noise you guys are talking about, but now that noise is gone now. It is followed by a buzzing noise and I could actually see my car being elevated. But I'm taking it in on friday so we'll see.