Hydropneumatic suspension

Hydropneumatic suspension is a type of motor vehicle suspension system, designed by Paul Magès, invented by Citroën, and fitted to Citroën cars, as well as being used under licence by other car manufacturers, notably Rolls-Royce (Silver Shadow), Maserati (Quattroporte II) and Peugeot. It was also used on Berliet trucks and has more recently been used on Mercedes-Benz cars. Similar systems are also used on some military vehicles. The suspension was referred to as oléopneumatique in early literature, pointing to oil and air as its main components.