3. Mechanical operation of convertible top

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E46c: only with ignition switched off.
If lines are disconnected, connect them to each other if at all possible.
E52/E85: Emergency operation
In the event of repeated operation, the system fluid is pumped into the supply tank of the hydraulic unit. If hydraulic components are now replaced, there will be too much fluid in the system. This may cause damage to the system in event of operation. (Checking fluid level, see Points 4 and 5).