Gasoline injection and ignition system with direct injection, function - GF07.70-P-0002MM

ENGINE 276.8 in MODEL 207, 212 as of model year 2014

ENGINE 276.8 in MODEL 218 as of model year 2015

ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218

Block diagram valid for model 204 with engine 276.9, valid for model 207, 212, 218 with engine 276.9 up to model year 2014

Fig 1: Gasoline Injection And Ignition System With Direct Injection Block Diagram (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Gasoline Injection And Ignition System With Direct Injection Block Diagram (2 Of 2)

Courtesy of MERCEDES-BENZ USA

Block diagram, networking of direct line valid for model 207, 212, 218 with engine 276.8 or 276.9 as of model year 2014

Fig 3: Networking Of Direct Line Block Diagram

Courtesy of MERCEDES-BENZ USA

Block diagram, CAN networking valid for model 207, 212 with engine 276.8 and 276.9 as of model year 2014, valid for model 218 with ENGINE 276.8 as of model year 2015

Fig 4: Can Networking Block Diagram - Model 207, 212 & 218

Courtesy of MERCEDES-BENZ USA

Block diagram, CAN networking valid for model 218 with engine 276.9 as of model year 2014 up to model year 2015

Fig 5: CAN Networking Block Diagram - Model 218

Courtesy of MERCEDES-BENZ USA

Gasoline injection and ignition system with direct injection, general points

The gasoline injection and ignition system with direct injection forms the engine timing "MED 17.7.3" in an electrical combination with the sensors and actuators of engine 276 DI (D irect-I njection).

The abbreviated designation MED 17.7.3 means:

M = Moronic

E = E lectronic accelerator

D = Direct injection

17.7.3 = Version 17.7.3

The ME-SFI [ME] control unit contains the whole engine timing.

Sensor data is directly read in from the engine timing and indirectly via the CAN network and actuates the control actuators as required. Here the individual functions and systems of the engine timing system unit are controlled and coordinated by the ME-SFI [ME] control unit.

The following table represents the model and major assembly overviews for the engines 276.8 and 276.9:

Sales designation	Model	Motor	Transmission	Engine timing
Model series 204
C 300	204.055 (Sedan)	276.957	722.906	MED 17.7.3
C 300	204.255 (wagon)	276.957	722.906	MED 17.7.3
C 350	204.057 (Sedan)	276.957	722.906	MED 17.7.3
C 350	204.257 (wagon)	276.957	722.906	MED 17.7.3
C 350	204.357 (Coupe)	276.957	722.906	MED 17.7.3
C 300 4MATIC	204.080 (Sedan)	276.957	722.960	MED 17.7.3
C 350 4MATIC	204.088 (Sedan)	276.957	722.960	MED 17.7.3
C 350 4MATIC	204.388 (Coupe)	276.957	722.960	MED 17.7.3
GLK 350	204.957	276.957	722.906	MED 17.7.3
GLK 300 4MATIC	204.990	276.957	722.960	MED 17.7.3
GLK 350 4MATIC	204.988	276.957	722.960	MED 17.7.3
Model series 207
E 300 BlueEFFICIENCY	207.355 (Coupe)	276.957	722.906	MED 17.7.3
E 350 BlueEFFICIENCY	207.359 (Coupe)	276.957	722.906	MED 17.7.3
E 400 BlueEFFICIENCY	207.361 (Coupe)	276.850	722.904	MED 17.7.3
E 300 BlueEFFICIENCY	207.362 (Coupe)	276.820	722.904	MED 17.7.3
E 400 BlueEFFICIENCY	207.365 (Coupe)	276.820	722.904	MED 17.7.3
E 400 4MATIC BlueEFFICIENCY	207.367 (Coupe)	276.820	722.961	MED 17.7.3
E 350 4MATIC BlueEFFICIENCY	207.388 (Coupe)	276.957	722.960	MED 17.7.3
E 300 BlueEFFICIENCY	207.455 (Cabriolet)	276.957	722.906	MED 17.7.3
E 350 BlueEFFICIENCY	207.459 (Cabriolet)	276.957	722.906	MED 17.7.3
E 400 BlueEFFICIENCY	207.461 (Cabriolet)	276.850	722.904	MED 17.7.3
E 300 BlueEFFICIENCY	207.462 (Cabriolet)	276.820	722.904	MED 17.7.3
E 400 BlueEFFICIENCY	207.465 (Cabriolet)	276.820	722.904	MED 17.7.3
Model series 212
E 300	212.055 (Sedan)	276.952	722.906	MED 17.7.3
E 350	212.059 (Sedan)	276.952	722.906	MED 17.7.3
E 450	212.061 (Sedan)	276.850	722.904	MED 17.7.3
E 400	212.065 (Sedan)	276.820	722.904	MED 17.7.3
E 400 4MATIC	212.067 (Sedan)	276.820	722.961	MED 17.7.3
E 300 4MATIC	212.080 (Sedan)	276.952	722.960	MED 17.7.3
E 350 4MATIC	212.088 (Sedan)	276.952	722.960	MED 17.7.3
E 450 4MATIC	212.099 (Sedan)	276.850	722.960	MED 17.7.3
E 320	212.162 (Long sedan)	276.820	722.904	MED 17.7.3
E 400	212.165 (Long sedan)	276.820	722.904	MED 17.7.3
E 400	212.167 (Long sedan)	276.820	722.961	MED 17.7.3
E 300	212.168 (Long sedan)	276.820	722.961	MED 17.7.3
E 300	212.255 (wagon)	276.952	722.906	MED 17.7.3
E 350	212.259 (wagon)	276.952	722.906	MED 17.7.3
E 450	212.261 (wagon)	276.850	722.904	MED 17.7.3
E 400	212.265 (wagon)	276.820	722.904	MED 17.7.3
E 400 4MATIC	212.267 (wagon)	276.820	722.961	MED 17.7.3
E 300 4MATIC	212.280 (wagon)	276.952	722.960	MED 17.7.3
E 350 4MATIC	212.288 (wagon)	276.952	722.960	MED 17.7.3
E 450 4MATIC	212.299 (wagon)	276.850	722.960	MED 17.7.3
Model series 218
CLS 300	218.355 (Coupe)	276.952	722.906	MED 17.7.3
CLS 350	218.359 (Coupe)	276.952	722.906 725.011	MED 17.7.3
CLS 450	218.361 (Coupe)	276.850	722.904 725.011	MED 17.7.3
CLS 320	218.362 (Coupe)	276.820	722.904 725.011	MED 17.7.3
CLS 400	218.365 (Coupe)	276.820	722.904 725.011	MED 17.7.3
CLS 400 4MATIC	218.367 (Coupe)	276.820	722.961	MED 17.7.3
CLS 450 4MATIC	218.368 (Coupe)	276.850	722.961	MED 17.7.3
CLS 350	218.959 (Shooting Brake)	276.952	722.906 725.011	MED 17.7.3
CLS 450	218.961 (Shooting Brake)	276.850	722.904 725.011	MED 17.7.3
CLS 320	218.962 (Shooting Brake)	276.820	722.904 725.011	MED 17.7.3
CLS 400	218.965 (Shooting Brake)	276.820	722.904 725.011	MED 17.7.3
CLS 400 4MATIC	218.967 (Shooting Brake)	276.820	722.961	MED 17.7.3
CLS 450 4MATIC	218.968 (Shooting Brake)	276.850	722.961	MED 17.7.3

The engine timing is subdivided into the following systems:

Base functions
Engine system
Fuel injection system
Ignition system
Exhaust system

Base functions

Control unit diagnosis
Fault memory
On-board diagnosis II (OBD II)
Diagnosis via CAN
CAN network
Flash programming
Variant coding
Drive authorization system stage 3 (DAS 3)
Torque coordination
Thermal management
Alternator interface
Maximum speed limit

Diagnosis

For diagnostic purposes the DTC for the engine timing are read out and cleared by the XENTRY Diagnostics and targeted individual diagnostic functions are actuated.

CAN network

The ME-SFI [ME] control unit exchanges data via the attached drive train CAN and chassis CAN (up to model year 2014) or chassis CAN 1 (as of model year 2014) with other control units which are integrated into the CAN network.

The ME-SFI [ME] control unit also acts as the interface (gateway) between the two CAN bus systems. The ME-SFI [ME] control unit is also attached to the drive train sensor CAN (for code 920 (Gasoline direct injection with stratified charge)) and exchanges data over it.

Flash programming

The engine timing in ME-SFI [ME] control unit is flashable, that is the complete software of the control unit can be exchanged with XENTRY Diagnostics (installed new). The software required for control unit programming can be found on the Star Diagnosis software DVD.

Variant coding

With variant coding the following vehicle versions and equipment can, for example, be coded using XENTRY Diagnostics:

Vehicle model
National version
Exhaust variants
Transmission version

Engine system

Starter relay actuation
Throttle valve control
Safety fuel shutoff
Transmission overload protection
Electronic Stability Program control unit support
Fully integrated transmission control support
Starting torque limitation
Suction fan actuation
Calibration of throttle valve
Intake manifold switchover (selector drum and resonance flap) (for engine 276.9)
Boost pressure control (over wastegate) (for engine 276.8)
Regulated adjustment of the intake and exhaust camshafts
EGR (EGR) (for code 920 (Gasoline direct injection with stratified charge))
Control of the engine start/stop function (for code B03 (ECO start/stop function))

Fuel injection system

Cylinder-selective DI
Gasoline high pressure regulation
Start, post-start phase and acceleration enrichment
Warming-up control
Idle speed control
Limp-home function
Increasing the rotary speed for an activated A/C
Deceleration fuel shutoff
Fuel pump control (low fuel pressure)
Height adaptation (integrated pressure sensor in the ME-SFI [ME] control unit)
Load change function
RPM limitation

Ignition system

Multi-spark ignition
Ignition map
RPM limitation
Knock control
Synchronization of camshaft and crankshaft positions

Exhaust system

Catalytic converter heating
Oxygen sensor heater control straight-line lambda control
Purging of NOx storage catalytic converters (for code 920 (Gasoline direct injection with stratified charge))

Homogeneous mode (engine 276 DI with homogeneous mode (DEH))

In homogeneous mode an homogeneous combustible fuel/air mixture (λ=1) is generated within the whole combustion chamber. There are no further measures required for exhaust aftertreatment since the normal three-way catalytic converter adequately converts the pollutants.

Stratified operation (engine 276 DI with stratified charge (DES)) (for code 920 (Gasoline direct injection with stratified charge))

During stratified operation, a combustible mixture (λ ≈1) is present only in the vicinity of the spark plug (R4) while various lambda values are present in the remaining combustion chamber. This varies from pure intake air through to exhaust gases from the EGR. This causes the fuel consumption in stratified operation to be less than in homogeneous mode. Due to the excess air which consists of up to 75% by volume of nitrogen the NOx development in stratified operation is significantly higher than in homogeneous mode. This requires use of a NOx storage catalytic converter.

Homogeneous stratified operation (HOS) (engine 276 DI with stratified charge (DES)) (for code 920 (Gasoline direct injection with stratified charge))

The new operating mode HOS shows that it can deliver more favorable values in the range above 4 bar than pure stratified operation. It also allows replacement of homogeneous mode up to above 7 bar, whereby significant savings in fuel consumption are achieved.

HOS is a combination of the homogeneous lean and classic stratified combustion process. For a unthrottled engine the first injection is sprayed in suction stroke while the actual "stratified" injection takes place before the ignition.

The following table presents the various different components on engine 276.9 for homogeneous mode (HID) and stratified operation (DIS):

Ignition ON, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1000MM
Ignition ON, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1000MMQ
Starting, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1001MM
Starting, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1001MMQ
Ignition OFF, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1002MM
Ignition OFF, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1002MMQ
Fuel supply, function		GF07.10-P-1003MM
Injection regulation, function	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218	GF07.10-P-1004MM
Injection regulation, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF07.10-P-1004MMP
Ignition system function	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218	GF07.10-P-1005MM
Ignition system function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF07.10-P-1005MMP
Synchronize fuel injection and firing order function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1006MM
Synchronize fuel injection and firing order function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1006MMQ
Start, post-start phase and warm-up enrichment, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1007MM
	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF07.10-P-1007MMP
	ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1007MMQ
RPM control, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1008MM
RPM control, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1008MMQ
Alternator interface function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1009MM
Alternator interface function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1009MMQ
Lambda control, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1010MM
Lambda control, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1010MMQ
Smooth running control, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1011MM
Smooth running control, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1011MMQ
Thermal management, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1012MM
	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF07.10-P-1012MMP
	ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1012MMQ
Torque coordination, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1013MM
Torque coordination, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1013MMQ
Deceleration fuel shutoff, function		GF07.10-P-1014MM
Knock control, function	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218	GF07.10-P-1015MM
Knock control, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF07.10-P-1015MMP
Camshaft adjustment, function		GF07.10-P-1016MM
Intake manifold switchover, function	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218	GF07.10-P-1017MM
Engine limp-home mode, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1019MM
Engine limp-home mode, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1019MMQ
On-board diagnosis, function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF07.10-P-1020MM
On-board diagnosis, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF07.10-P-1020MMQ
Engine timing start-stop function	ENGINE 276.9 in MODEL 204 with CODE B03 (ECO start/stop function) ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014 with CODE B03 (ECO start/stop function)	GF07.10-P-1041MM
Engine timing start-stop function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 with CODE B03 (ECO start/stop function) ENGINE 276.8 in MODEL 218 as of model year 2015 with CODE B03 (ECO start/stop function) ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014 with CODE B03 (ECO start/stop function)	GF07.10-P-1041MMQ
Charging, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF09.00-P-2000MMP
Exhaust treatment function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF14.00-P-3000MM
Exhaust treatment function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF14.00-P-3000MMQ
Exhaust gas recirculation, function	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218 with CODE 920 (Direct petrol injection with stratified charging)	GF14.20-P-3000MM
Exhaust gas recirculation, function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 with CODE 920 (Direct petrol injection with stratified charging) ENGINE 276.8 in MODEL 218 as of model year 2015 with CODE 920 (Direct petrol injection with stratified charging)	GF14.20-P-3000MMP
Electronic accelerator function	ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014	GF30.20-P-3015MM
Electronic accelerator function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014	GF30.20-P-3015MMQ
On-board refueling vapor recovery function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 with CODE 494 (US version) ENGINE 276.8 in MODEL 218 as of model year 2015 with CODE 494 (US version) ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218 with CODE 494 (US version)	GF47.10-P-3004MM
Purging function	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218	GF47.30-P-3015MM
Purging function	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF47.30-P-3015MMA
Purging system with leak test function	ENGINE 276.9 in MODEL 204 with CODE 494 (US version) ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014 with CODE 494 (US version)	GF47.30-P-3016MM
	ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014 with CODE 494 (US version)	GF47.30-P-3016MMQ
	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 with CODE 494 (US version) ENGINE 276.8 in MODEL 218 as of model year 2015 with CODE 494 (US version)	GF47.30-P-3016MMP
Overview of system components for gasoline injection and ignition system with direct injection	ENGINE 276.9 in MODEL 204, 207, 212 (except 212.095), 218	GF07.70-P-9998MM
	ENGINE 276.8 in MODEL 207, 212 as of model year 2014 ENGINE 276.8 in MODEL 218 as of model year 2015	GF07.70-P-9998MMP