911 Carrera 4 Cabriolet AWD F6-3600cc 3.6L SOHC (1990)
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Disconnect system tester.
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Correct the brake fluid level.
This requires operating the brake pedal first so many times (with the ignition on) until the pump assembly is operated. Correct the brake fluid level
only after the pump assembly has been switched off.
Never pour in so much brake fluid that the level is above the "max." mark.