17 00 515 Checking function of radiator and heating system: Notes
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 328xi, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Danger of scalding!
Only carry out work on cooling system after engine has cooled down.