ME-SFI transmission shift delay, function - GF07.61-P-4023M

ENGINE 275.950 in MODEL 215, 220

ENGINE 275.951 in MODEL 230 up to Model Year 8

ENGINE 275.953 in MODEL 216, 221 up to Model Year 8

ENGINE 275.954 in MODEL 230 up to Model Year 8

ENGINE 275.980 in MODEL 215, 220

ENGINE 275.981 in MODEL 230 up to Model Year 8

ENGINE 275.982 in MODEL 216, 221 up to Model Year 8

ENGINE 285.950 in MODEL 240

ENGINE 285.980 in MODEL 240

Fig 1: Identifying ME-SFI Transmission Shift Delay Function Diagram

Courtesy of MERCEDES-BENZ USA

The transmission shift delay is designed to warm up the catalytic converters more rapidly to operating temperature after engine start.

The transmission shift delay is performed completely electronically in combination with the automatic transmission. No additional components are required.

The engine control unit requests from the transmission control unit via the CAN data bus to alter the shift characteristic curves.

The partial load shifts from 1st and 2nd gear into 3rd gear take place at higher engine speeds.

The vehicle speed signal is received by the ESP control unit via the CAN data bus.

The transmission shift delay is active for 160 s max., if the coolant temperature is less than 50°C when starting and at vehicle speeds lower than 53 km/h.

ME-SFI control unit, location/task/design/ function		GF07.61-P-5000M
Coolant temperature sensor, location/task/ design/function		GF07.04-P-5026M
ETC control unit, location/task	Selector lever position information P/N and driving position engaged. Transmission 722.6	GF27.19-P-4012G