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Activated charcoal canister shutoff valve, location/task/design/function - GF47.30-P-4033M

MODEL 215, 220 with ENGINE 275.950 with CODE (494) USA version 

MODEL 230 with ENGINE 275.951 with CODE (494) USA version up to Model Year 8 

MODEL 216, 221 with ENGINE 275.953 with CODE (494) USA version up to Model Year 8 

MODEL 230 with ENGINE 275.954 with CODE (494) USA version up to Model Year 8 

MODEL 215, 220 with ENGINE 275.980 with CODE (494) USA version 

MODEL 230 with ENGINE 275.981 with CODE (494) USA version up to Model Year 8 

MODEL 216, 221 with ENGINE 275.982 with CODE (494) USA version up to Model Year 8 

MODEL 240 with ENGINE 285.950 with CODE (494) USA version 

MODEL 240 with ENGINE 285.980 with CODE (494) USA version 

Fig 1: Identifying Activated Charcoal Canister Shutoff Valve Components
G07631625Courtesy of MERCEDES-BENZ USA
  Activated charcoal canister shutoff valve position The activated charcoal filter shutoff for model 216, 221, 240 is located above on the aeration connection of the activated charcoal canister.  
Model 215, 220 GF47.30-P-4033-01MM
Model 230 GF47.30-P-4033-01RM
  Activated charcoal canister shutoff valve task The shutoff valve closes ventilation of the activated charcoal canister for leak testing of the purge system.  
  Activated charcoal canister shutoff valve design Solenoid which closes the shutoff valve when energized. A mechanical safety valve is also installed.  
  Activated charcoal canister shutoff valve function The shutoff valve is actuated at the ground end and closed by the ME-SFI [ME] control unit (N3/10) for leak testing of the purge system. The voltage supply takes place from "terminal 87 M". If the shutoff valve jams during opening, the safety valve opens from about -25 mbar and admits air to fuel tank.