The Hydraulic Shocks sounds good
http://www.bbc.co.uk/dna/h2g2/A694000
An extract of from the above site for Citroen BX
"The hydraulic suspension system, when it worked, was incredible. Notwithstanding the novelty value of being able to vary the ride height from low-down mean machine to 'tiptoe through the tulips', you could drive over speed ramps as though they weren't there. You could fill it with stuff and, if it was overloaded, the suspension would refuse to lift. Take stuff out until the suspension lifts and bingo! - you're not overloaded. And the hydraulic suspension powering the brakes meant that the more weight the car had in it, the more power went to the brakes.
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