The Peugeot 405 4×4 has a hydraulic sphere to accumulate pressure.
Accumulator: PG 40 AR
I.F.H.S. in Belgium manufactures hydraulic spheres, accumulator and other spheres for Citroën cars since 1984. The factory has an ISO 9002 certificate, and since 1996, the hydraulic spheres have been TÜV-tested (FTP 96/24694A/03, TZ-028141-A0-241).