These can actually be very fun to play with. A friend of mine drove an old Lincoln Town Car back in college. Like Skip said, the car just adjusts itself so that when the car is weighed down, it sits level. Well, one time, we had a few large, silver, heavy, liquid containers in the trunk

The Town Car will hold 3 in the trunk , comfortably, by the way, in case your wondering

Anyway, once we got where we were going, we turned the car off, and took them out and went inside. Well, the car doesn't adjust itself back to normal until its turned on again. So now, without the
LARGE ammount of weight in the back, the car was sitting in the driveway with its back end all jacked up like a drag car. The back end was so pumped up with air to level out the weight, the back bumper was almost 4 feet off the ground. Classic. He has pictures of it, I'll never forget that. One of my favorite lasting automotive thoughts. HA HA
Hilg