Roots supercharger This mechanical supercharger is installed in Mercedes-Benz compressor sports cars. The two rotors have three vanes each and are driven via gear wheels. The suction and compression can be shown particularly clearly. description ordernumber 1239 see also: exhaust turbocharger with charging-pressure control VP 44 (Bosch) radial-piston distributor-type injection pump switch-over induction system engine of a VW Golf with transmission