The E36 3-Series Convertible (318i through 328i and the M3 Cabrio, 1994-1999) uses an electro-mechanical power top, not a hydraulic one — the detail most people get wrong.
Unlike the E46 Cabrio and the Z3, which drive a hydraulic pump and cylinders, the E36 3-Series top is folded by small electric gearmotors turning mechanical gears, tension rods and Bowden cables
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