00 00. Steering fluid reservoir: checking fluid level, topping up if necessary
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW 325xi, 2005 BMW 325i, and 2005 BMW 325Ci. However, it is still accessible from the selected car via links, so may be relevant.
The steering fluid must be topped up if the level in the steering fluid reservoir is below the Max. marking.