C 55 AMG (203.076) V8-5.5L (113.988) (2006)
Vacuum Brake Booster Check Valve: Testing and Inspection
Checking Check Valve
1
Connect tester (030) to brake booster
NOTE:
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Reduce vacuum by depressing the brake pedal several times.
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Test connection (031) for testing the check valve (17) or brake booster (16).
2
Start engine and create a vacuum of 0.75 to 0.80 bar by accelerating and then suddenly releasing the accelerator pedal
NOTE: Reduce vacuum > 0.8 bar by depressing the brake pedal several times.
3
Switch off engine
NOTE:
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Vacuum must not drop by more than 0.2 bar within 30 seconds.
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Vacuum loss > 0.2 bar, replace vacuum line if necessary, checking brake booster
4
Disconnect tester (030) from brake booster