Checking/Topping Off Fluid Level In Hydraulic System: GS6S37BZ/GS6S53BZ/SMG
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- Method 1: Switch on ignition. Bleed hydraulic system. See BLEEDING . Open filler screw (1). Fill expansion tank up to MAX marking with DOT 4 brake fluid. See Fig 1.
- Method 2: Depressurize hydraulic system in accordance with BMW diagnosis system. Open filler screw (1). Add BMW DOT 4 hydraulic fluid up to lower edge of filler cap. See Fig 1.