The ME-SFI safety fuel shutoff function - GF07.61-P-3018V

ENGINE 272.920 in MODEL 203 up to Model Year 8

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203 up to Model Year 8

ENGINE 272.941 in MODEL 203 up to Model Year 8

ENGINE 272.942 in MODEL 171 up to Model Year 8

ENGINE 272.943 in MODEL 211, 219

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251 up to Model Year 8

ENGINE 272.946 in MODEL 221 up to Model Year 8

ENGINE 272.960 in MODEL 203 up to Model Year 8

ENGINE 272.963 in MODEL 171 up to Model Year 8

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221 up to Model Year 8

ENGINE 272.966 in MODEL 230 up to Model Year 8

ENGINE 272.967 in MODEL 164, 251 up to Model Year 8

ENGINE 272.970 in MODEL 203 up to Model Year 8

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221 up to Model Year 8

ENGINE 273.922 in MODEL 221 up to Model Year 8

ENGINE 273.923 in MODEL 164 up to Model Year 8

ENGINE 273.924 in MODEL 221 up to Model Year 8

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221 up to Model Year 8

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251 up to Model Year 8

ENGINE 273.965 in MODEL 230 up to Model Year 8

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221 up to Model Year 8

ENGINE 272.940 in MODEL 209

ENGINE 272.960 in MODEL 209

Shown on engine 272.963 in model 171

Fig 1: ME-SFI Safety Fuel Shutoff Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The safety fuel shutoff has the following tasks:

In the event of mechanical faults at the throttle valve actuator, the engine speed is limited to approx. 1400 to 1800 RPM by cutting in and out the fuel injection valves (strong surging engine running).
If the TNA engine speed signal is missing, interrupts fuel pump actuation.
When the airbags are activated (head-on collision), shuts off the fuel pump. To do this, the ME control unit receive a crash signal from the airbag control unit. The fuel valves are actuated briefly to reduce the pressure in the fuel system.

Component description for the ME-SFI [ME] control unit	GF07.61-P-6000V
Component description for the crankshaft Hall sensor	GF07.04-P-6220V
Component description for the camshaft Hall sensor	GF07.04-P-6020V
ME-SFI fuel pump actuation function	GF07.61-P-3012V
ME engine speed signal function	GF07.61-P-3017V
ME-SFI electronic accelerator function	GF30.20-P-3012V
Electronic accelerator pedal emergency running mode function	GF30.20-P-4026V