21 53 ... Checking/Topping Up Fluid Level In Hydraulic System (GS6S37BZ/ GS6S53BZ/ SMG)

WARNING: This page is about a different car, the 2006 BMW M5 and 2006 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 080

IMPORTANT:

There are 2 different methods of checking/topping up the fluid level.

IMPORTANT:

Use special tool exclusively for filling hydraulic systems with Pentosin.

Method 1:

Switch on ignition.
Bleed hydraulic system in accordance with BMW diagnosis system.
Open filler screw (1).
Fill expansion tank with special tool 00 2 080 up to MAX mark.

Fig 1: Identifying Label Mark

Courtesy of BMW OF NORTH AMERICA, INC.

Method 2:

Depressurize hydraulic system in accordance with BMW diagnosis system.
Open filler screw (1).
Fill expansion tank with special tool 00 2 080 up to lower edge of filler opening.

Fig 2: Identifying Label Mark

Courtesy of BMW OF NORTH AMERICA, INC.