3. Mechanical operation of convertible top

WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

E46c: only with ignition switched off.
If lines are disconnected, connect them to each other if at all possible.
E52/E85: Emergency actuation
In the event of repeated actuation, 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 actuation. (Checking fluid level, see POINTS 4 and 5 ).