same here, hissing noise has been there forever, no noticeable adjustment when i unlock car.

Maybe yours has the "Lowrider Package" ;)

I know it looks pretty sick. If the front end would be the same height as the rear, I'd prob wouldn't even create this thread lol. It's about 6 inches lower than normal when the car is off.

any updates from the dealer?

It was fixed under warranty, indeed it was a blown shocks.

Interesting.

I thought the hiss after unlocking the truck, and before starting it, was normal? I typically hit the unlock button about 10 feet away and as I'm about to open the door, I hear a hiss for maybe 1.5-2 seconds but never notice any real elevation change. I've tried watching it but never was able to see movement.

Also, it doesn't happen every time, just sometimes, like after the truck sat overnight.

Anyways, is this normal? My truck is going into the dealer on Tuesday, since my factory warranty ends 8/15...so I'd like to get this taken care of now. Or does CPO cover this?

It's normal for hiss, however giant changes like mine was not normal. CPO will cover it as well, however you will pay a $50 deductible.

Just to warn you...I had a CPO 2005 4.8is. I had the same issue with leaking airbags. My dealer fixed it but said that they had to go to BMWNA for approval because it actually wasn't covered under the CPO warranty. Since then, I had a faulty front ride sensor and master control unit. Those were fixed under CPO warranty but at that point it was time to say goodbye to the car :(
Fixing anything with the auto levelling suspension is not cheap. And also not guaranteed to be fixed on the first attempt.
jeremym, if your warranty expires 8/15 have them examine EVERYTHING associated with the suspension and keep all documentation so they are libel if things go south after 8/15.
Now I have the 07 4.8i and I watch for that levlling on start-up out of habit :D
Just my 2C.

Wow good to know, dealership greed is normal I guess.

Interesting. Its actually going in on Tuesday for squeeking suspension so i will mention the hiss and have them check it out as well. My SA, last time I was there, told me they would check everything over before my warranty ran out...so hopefully I don't have any issues. Thanks!