Disconnect the bleeder unit for the brake fluid (after part exchange)

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NOTE: RISK OF DAMAGE
Paint damage.
Mechanical or chemical action may lead to paint damage.

Cover up working area with specified covering material only.

Switch off bleeder unit (1) and remove it from the brake fluid expansion tank.
Check the brake fluid level and adjust it to the maximum mark if necessary.

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Check the seal of sealing cap (1) to ensure that it fits correctly and check for damage; if necessary, replace it.
Close the sealing cap (1) .

Courtesy of BMW OF NORTH AMERICA, INC.