00 00... Brake hydraulics: checking fluid level, topping up if necessary
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
If brake fluid level is below Max. marking on expansion tank, top up brake fluid to Max. marking. Use only recommended brake fluid.