Necessary preliminary work
IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in BLEEDING BRAKE SYSTEM WITH DSC.
Use only BMW-approved brake fluids.
Connect bleeder unit to expansion tank and switch on.
NOTE: Follow the applicable machine manufacturer's operating instructions.
Charging pressure should not exceed 2 bar.
Fig. 9: Connecting Bleeder Unit To Expansion Tank
Fully rinse the brake system
Connect vent hose with collecting vessel to vent valve on rear right brake caliper.
Open vent valve and purge until clear, bubble-free brake fluid emerges.
Close vent valve.
Follow same procedure on rear left, front right and front left wheel brake.
Fig. 10: Locating Vent Valve On Rear Right Brake Caliper
Switch off bleeder unit and remove from expansion tank.
Check brake fluid level. If necessary, top up/draw off to "MAX" level.
Close expansion tank.
NOTE: Pay attention to gasket (1) in sealing cap.
Fig. 11: Identifying Gasket And Brake Fluid Level
SAFETY INFORMATION FOR WORKING ON VEHICLES WITH AUTOMATIC ENGINE START-STOP FUNCTION (MSA)
WARNING: If the engine hood/bonnet contact is pulled upwards (workshop mode), the information "switch closed" is output. The automatic engine start-stop function is active.
An automatic engine start is possible.
Observe safety precautions when working on MSA vehicles.
Before carrying out practical work on the engine, always ensure that the MSA functionality is deactivated so as to prevent automatic engine starting while work is being carried out in the engine compartment.
MSA function is deactivated by
Fig. 12: Identifying MSA Button
To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.
Fig. 13: Identifying Engine Hood/Bonnet Contact Distance (Workshop Mode And
Basic Setting)
When working with diagnosis tools