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

ENGINE 104.941 /943 /944 /991 /994 as of 1.8.96 with TRANSMISSION 722.6

ENGINE 104.995 with TRANSMISSION 722.6

with CODE (494a) USA version

with CODE (807) Model year 1997

with CODE (808) Model year 1998

with CODE (498) as of Model Year 97 Japanese version

ENGINE 111.921 /942 as of 1.9.98,

111.946 as of 1.6.98,

111.944/975 as of 1.8.96,

111.947 /951 /952 /955 /956 /957 /958 /973 /982 /983

with TRANSMISSION 722.6

ENGINE 111.945

in MODEL 202.020 /080 as of 1.9.98,

208.335 /435 as of 1.6.98 with TRANSMISSION 722.6

ENGINE 111.974 with TRANSMISSION 722.6

with CODE (494a) USA version

with CODE (807) Model year 1997

with CODE (808) Model year 1998

ENGINE 112.910 /911 /912 /913 /914 /917 /920 /921 /922 /923 /940 /941 /942 /943 /944 /946 /947 /949 /954 /955 /970 /972 /975 with TRANSMISSION 722.6

ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 with TRANSMISSION 722.6

ENGINE 119.980 /981 /982 /985 with TRANSMISSION 722.6

ENGINE 120.982 /983 with TRANSMISSION 722.6

ENGINE 137.970 with TRANSMISSION 722.6

Shown on Engine 119

Fig 1: Identifying ME-SFI Transmission Shift Delay Function - Shown On Engine 119

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The transmission upshift retard is designed to more rapidly heat up the catalytic converter after engine start to its operating temperature.

The transmission upshift retard is performed completely electronically in combination with the automatic transmission 722.6. No additional components are required.

The engine control unit requests the ETC control unit (Y3/7n2) over the CAN databus to alter the shift characteristic curves. The part load shifts (1-2, 2-3) are performed at a higher vehicle speed/engine speed.

The transmission upshift retard is active for max. 160 seconds if:

Coolant temperature at start < 50 °C
Vehicle speed < 53 km/h.

The vehicle speed information for detecting the drive mode is received by the ME control unit via CAN from the control unit for traction system (ABS, ASR, ETS or SPS, according to model and equipment).

Motor electronics control unit, location/task/ design/function	other than engine 111 EVO	GF07.61-P-5000F
	Engine 111 EVO	GF07.61-P-5000GS
HFM-SFI control unit, location/task/design/ function		GF07.51-P-4103D
CAN data bus, function	Vehicles with CAN	GF54.00-P-0005F
Coolant temperature sensor, location/task/ design/function	Engine 119, 120	GF07.04-P-5026F
	Engine 104, 111	GF07.04-P-5026G
	Engine 112, 113, 137	GF07.04-P-5026A
ETC control unit, location/task	Transmission 722.6	GF27.19-P-4012G