The most expensive part in this assembly is the Gear Assembly,primary Drive.
Parts such as the Clutch: Circlip, Bearing(15x28x2), Screw 6x16, Spring are included in the Gs500e 1991 (m) (e01 E02 E04 E15 E16 E17 E21 E22 E24 E25 E34 E39 Clutch parts fiche.
In this schematic the "Plate,clutch Drive (nas)" is used most often.