BMW MINI Owner's Manual page 132

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. Turn the cap until there is an audible click.
Have the reason for the coolant loss eliminated
as soon as possible.
130
Online Edition for Part no. 01 40 2 605 657 - © 07/10 BMW AG Online Edition for Part no. 01 40 2 605 657 - © 07/10 BMW AG