car lowers itself

Hello, I'm new, and I signed up to this forum since I'm planning on buying a 2001 Allroad 2.7T, but the car I'm looking at currently has a problem:

I was told once you "pump" it up into the offroad suspension mode it goes up, but then it slowly comes back down again and will end up in the lowest setting. A diagnostic tool was connected but no fault was read out. The whole car lowers, not only one side. The suspension light in the cluster is on.

Has anyone experienced similar problems or heard of this problem? Knows of a fix? Knows if this is a common problem? Knows how much a dealership charges for this problem?

Thanks for answers!

Alex

At different suspension levels, the car has maximum speeds it allows. I believe the top allowed speed in the highest suspension setting is something around 25mph. If you exceed that, the car will lower itself automatically to the next setting, etc. That may be why it is lowering. If that's not it, you may have a leak in the air suspension that holds the car up.