| Brake system (hydraulic unit, brake hoses, brake pipes and brake calipers) operating properly and free of leaks. |
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| Remove bleed valve at one of front brake calipers. Connect and bleed gauge from tester for brake pressure regulator -V.A.G 1310 A-. |
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| Apply pressure to brake pedal until the gauge indicates a pressure of 50 bar. The pressure must not drop by more than 4 bar during the test period of 45 seconds. Renew brake master cylinder if pressure drops greatly. |
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