Topping up/extracting fluid

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2013 BMW 328i, 2012 BMW 328i, 2011 BMW 328i, 2010 BMW 335i, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

E46c: only when soft top is stowed and soft top compartment lid is closed. E52E85only with soft top closed
E64/F12: The hydraulic fluid does not have to be changed because the system is filled with life-time fluid. Only the approved hydraulic fluid may be used in the event of leaks.
Observe brief instructions.
Remove hydraulic unit without detaching lines.
Fluid is supplied with the repair kits (e.g. banjo bolts/seals, hoses, cylinders) and is available separately (refer to BMW Parts Department).
Pour in fluid with bottle through filler opening.
Hydraulic unit must be removed if overfilled. Allow fluid to escape through filler opening and collect.