I had a Citroën Xantia as a company car many years ago. It was fairly conventional as Citroëns go, but it had hydro-pneumatic height-adjustable suspension (to quote the sign above). That was quite something - it had a really good ride, and when I was bored in a traffic jam I would gently adjust the ride height to rise imperiously above my fellow motorists or to sink slowly in the west.
The other thing I remember about that car was that there was a problem with the handbrake, which meant the car could roll away if you didn't leave it parked in gear. It would sometimes do that while idling too, particularly when the gas suspension decided to level itself. Citroën recalled the vehicle, and do you know what they did to it? They snipped off the first few teeth of the handbrake ratchet, which meant you needed to be Arnold Schwarzenegger to pull up the lever with enough force for it to latch. A crude fix, but it didn't roll away again after that.
-R