00 00... Checking coolant level and concentration, correcting if necessary

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.

Check connections, hose clamps and hoses for coolant residues and damage such as e.g. cracks.
Check coolant composition in expansion tank: should be - 35 °C to - 40 °C.
Check coolant level in expansion tank. Coolant level must be between the "Min." and "Max." marks. If necessary, top up coolant to max. fluid level. If there is no coolant, also identify the cause and notify the customer.
During refill (for special allocation):
- If needed, DRAIN COOLANT volume difference.
- Top up prescribed coolant.