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E93 Complete Vehicle Workbook
Hydraulic Components
The retractable hardtop and the rear module are driven hydraulically. The hydraulic system consists of 8 hydraulic cylinders that are
supplied with pressure by the hydraulic system via the hydraulic lines. The cylinders are always activated in pairs. The hydraulic assembly
is installed in a recess in the luggage compartment floor. Four cylinders are required for the movement of the hardtop: the two roof shell
cylinders and two rear pillar cylinders. The rear module is opened and closed by two rear module cylinders. Two closure cylinders are
responsible for locking/unlocking the rear roof panels and the rear module.
Index Explanation Index Explanation
1
Right roof panel (shell) cylinder
6
Hydraulic assembly (pump, motor, valves and relays)
2
Right closure cylinder
7
Left main pillar cylinder
3
Right main pillar cylinder
8
Left closure cylinder
4
Right rear module cylinder
9
Left roof panel (shell) cylinder
5
Left rear module cylinder
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