Mini Cooper Owner's Manual page 152

MOBILITY
Topping off
1. Turn the cap of the expansion tank a little
counterclockwise to allow any accumulated
pressure to escape, then continue turning to
open.
2. Slowly fill to the correct fluid level; do not
overfill.
3. Close by turning the cap.
Have the reason for the coolant loss eliminated
as soon as possible.
150
Under the hood
Online Edition for Part no. 01 40 2 607 490 - © 03/11 BMW AG Online Edition for Part no. 01 40 2 607 490 - © 03/11 BMW AG