Only when venting!

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NOTE: Do not open the coolant expansion tank cap during the bleeding procedure.

Connect battery charger.
Switch the ignition on.
Set heater to maximum temperature and turn blower down to lowest speed.
Press accelerator pedal for 10 seconds to floor. Engine must not be started.
The bleeding procedure was started by pressing the accelerator pedal and takes approx. 12 min. (the electrical coolant pump was activated and switches off automatically after approx. 12 min).
Then top up fill level in coolant expansion tank with 100 ml above MAX (see illustration).
CHECK COOLING SYSTEM FOR WATERTIGHTNESS .
If venting has to be carried out again (e.g. if cooling system is leaking), allow DME to fall completely (leave ignition key removed for approx. 3 min), then repeat from Point 3.

Perform filling operation slowly.

Fill coolant expansion tank with 100 ml above MAX.

100 ml corresponds to A=6 mm.

Fig 1: Filling Coolant Expansion Tank With 100 ml Above MAX

Courtesy of BMW OF NORTH AMERICA, INC.

Close coolant expansion tank.

Installation note:

Close the sealing cap (1) until the arrows line up.

Fig 2: Closing Sealing Cap Until Arrow Marks Line Up

Courtesy of BMW OF NORTH AMERICA, INC.