mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Fuel Tank Pressure Release Valve|Testing and Inspection|Page 4234 > < Diagram Information and Instructions|Page 4230
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Fuel Tank Pressure Release Valve: Testing and Inspection

Fig. 85  EVAP Diagram

Fig. 60  Breather Valve Location

1.

Disconnect the breather valve at the fuel tank side of the valve.

Fig. 47  Breather Valve

2.

Connect a suitable vacuum-pressure tester to port (B) of the breather valve and apply pressure.

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The valve should open at approximately 30-50 mbar (0.435-0.725 psi.).  If not replace the breather valve.

3.

Apply vacuum to the breather valve.  

Fuel Tank Pressure Release Valve|Testing and Inspection|Page 4234 > < Diagram Information and Instructions|Page 4230