Checking Coolant Level:

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CAUTION: Check coolant level at a maximum coolant temperature of 30 °C.

NOTE: If ambient temperature exceeds 30 °C, allow engine to cool down at least to ambient temperature.

Open cap carefully.

Fluid level is O.K. when top edge of coolant expansion tank is between both markings (1 and 2) on float needle.

Fig 1: Checking Coolant Level

Courtesy of BMW OF NORTH AMERICA, INC.

Minimum cold fill level:

Upper edge of coolant expansion tank is level with marking (1).

Maximum cold fill level:

Upper edge of coolant expansion tank is level with marking (2).

If necessary, top up coolant.

NOTE: Tank mark indicates the fluid level at approx. 20 °C.

Check cooling system for leaks. Refer to 17 00 009 CHECKING COOLING SYSTEM FOR LEAKS (M54) .