500SL (129.067) V8-5.0L (119.960) (1990)
/v8-5.0l_(119.960)/Page-1368001.png)
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.
^
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.