Gasoline Injection And Ignition System With Direct Injection, Function - GF07.70-P-0002MNL
Engine 176.9, 177.9 in model 217
Engine 176.9, 177.9 in model 222
Engine 177.9 in model 290
up to model year 2021
Block diagram for networking the direct line
Block diagram for CAN-networking
Gasoline injection and ignition system with DI, general
The gasoline injection and ignition system with direct injection forms the engine management "MED 17.7.4" in an electrical combination with the sensors and actuators of engine 176/177 DI (Direct Injection).
The short designation MED 17.7.4 means:
M = Motronic
E = E lectronic accelerator pedal
D = D irect injection
17.7.4 = Version 17.7.4
The whole engine management is contained in the ME-SFI control unit. Sensor data are read in directly by the engine management and indirectly via the CAN network and the respective actuators are actuated. Here the individual functions and systems of the engine management are controlled and coordinated by the ME-SFI control unit.
The following table provides an overview of the vehicle model and major assembly overviews:
| Sales designation | Model | Engine | Transmission | Engine management | Notes |
|---|---|---|---|---|---|
| Model 222 with engine 176 | - | - | - | - | - |
| S 500 | 222.083 (Sedan) | 176.980 | 725.011 | MED 17.7.4 | - |
| S 5004M | 222.086 (sedan) | 176.980 | 725.041 | MED 17.7.4 | - |
| S 500 | 222.183 (Sedan Long) | 176.980 | 725.011 | MED 17.7.4 | - |
| S 5004M | 222.186 (sedan long) | 176.980 | 725.041 | MED 17.7.4 | - |
| Mercedes Maybach S 500 | 222.983 (sedan) | 176.980 | 725.011 | MED 17.7.4 | - |
| Mercedes Maybach S 500 4MATIC | 222.986 (sedan) | 176.980 | 725.041 | MED 17.7.4 | - |
| Model 217 with engine 176 | - | - | - | - | - |
| S 500 Coupe | 217.383 | 176.980 | 725.001 | MED 17.7.4 | - |
| S 500 4MATIC coupe | 217.386 | 176.980 | 725.041 | MED 17.7.4 | - |
| S 500 Cabriolet | 217.483 | 176.980 | 725.015 | MED 17.7.4 | - |
| Model 222 with engine 177 AMG | - | - | - | - | - |
| Mercedes AMG S 63 | 222.187 (sedan long) | 177.980 | 725.062 | MED 17.7.4 | - |
| Mercedes AMG S 63 4MATIC | 222.188 (sedan long) | 177.980 | 725.062 | MED 17.7.4 | - |
| Model 217 with engine 177 AMG | - | ||||
| Mercedes AMG S 63 | 217.387 (Coupe) | 177.980 | 725.066 | MED 17.7.4 | - |
| Mercedes AMG S 63 4MATIC | 217.388 (Coupe) | 177.980 | 725.096 | MED 17.7.4 | - |
| Mercedes AMG S 63 | 217.487 (Cabriolet) | 177.980 | 725.066 | MED 17.7.4 | - |
| Mercedes AMG S 63 4MATIC | 217.488 (Cabriolet) | 177.980 | 725.096 | MED 17.7.4 | - |
The engine management is subdivided into the following systems:
- Basic functions
- Engine system
- Fuel injection system
- Ignition system
- Exhaust system
Basic functions
- Control unit diagnosis
- Fault memory
- European On-Board Diagnosis
- Diagnosis via CAN
- CAN network
- Control module programming
- Transport mode
- Variant coding
- DAS stage 4 (FBS 4)
- Torque coordination
- Heat management
- Alternator interface
- Maximum vehicle speed limit
Diagnosis
For diagnostic purposes, the fault codes of the engine management system can be read out and deleted using XENTRY Diagnostics, and individual diagnostic functions can be specifically actuated.
CAN network
The ME-SFI [ME] control unit exchanges data with other control units that are integrated in the CAN network via the connected drive train CAN and engine CAN. The ME-SFI [ME] control unit also acts as an interface (Gateway) between the two CAN bus systems.
Control module programming
The engine management in the ME-SFI [ME] control unit is programmable, i.e. the complete software of the control unit can be exchanged (replaced) using XENTRY Diagnostics. The software required for control unit programming can be found on the diagnosis system software DVD.
Transport mode
In transport mode various functions of the engine management are limited.
If the kilometer reading on the vehicle is more than 250 km, the system condition "vehicle transport mode" is automatically deactivated and can also not be reactivated any more by the Xentry Diagnostics.
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
- Support for the A/T control unit
- Driving on torque limitation
- Fan operation
- Throttle valve calibration
- Boost pressure control (over wastegate)
- Regulated adjustment of the intake and exhaust camshafts
- ECO start/stop function
- Cylinder shutoff
Fuel injection system
- Cylinder-selective DI
- Fuel high pressure control
- Start, post-start phase and acceleration enrichment
- Warm-up control
- Idle speed control
- Limp-home function
- Rpm increase for an activated A/C
- Inertia fuel shutoff
- Fuel pump controlling (low fuel pressure)
- Altitude adaptation (integral pressure sensor in ME-SFI control unit)
- Load change function
- Rpm limitation
Ignition system
- Multi-spark ignition
- Ignition map
- Rpm limitation
- Knock sensor system
- Synchronization of camshaft and crankshaft position
Exhaust system
- Catalytic converter heating
- Oxygen sensor heater controlling
- Straight-line lambda control
Exhaust flap
In order to optimize the exhaust noise behavior of the exhaust system electrically actuated exhaust flaps are installed in the middle element and on the exhaust tailpipes of the rear muffler.
These are actuated by the left and right exhaust gas flap actuator motors, load-dependent and via a characteristics map of the respective drive program by the ME control unit.
The ME control unit has its own software for the exhaust gas flap actuators. It facilitates their stepwise opening.
The actuator motors can be diagnosed. The resulting engine protection function ensures that engine output is reduced in case they do not open.
The operating conditions of the engine and the associated active partial functions of the engine management are described in the following documents:
| Ignition, function | GF07.10-P-1023MNL | ||
| Starting, function | GF07.10-P-1001MNL | ||
| Fuel supply, function | GF07.10-P-1003MNL | ||
| Injection regulation, function | GF07.10-P-1004MNL | ||
| Ignition system function | GF07.10-P-1005MNL | ||
| Synchronize fuel injection and firing order function | GF07.10-P-1006MNL | ||
| Start, post-start phase and warm-up enrichment, function | GF07.10-P-1007MNL | ||
| Rpm control, function | GF07.10-P-1008MNL | ||
| Alternator interface function | GF07.10-P-1009MNL | ||
| Lambda control, function | GF07.10-P-1010MNL | ||
| Smooth running control, function | GF07.10-P-1011MNL | ||
| Thermal management, function | GF07.10-P-1012MNL | ||
| Torque coordination, function | GF07.10-P-1013MNL | ||
| Overrun mode fuel shutoff, function | GF07.10-P-1014MNL | ||
| Knock control, function | GF07.10-P-1015MNL | ||
| Camshaft adjustment, function | GF07.10-P-1016MNL | ||
| Engine limp-home mode, function | GF07.10-P-1019MNL | ||
| European OBD, function | GF07.10-P-1021MNL | ||
| ECO start/stop function engine management, function | GF07.10-P-1042MNL | ||
| Cylinder shutoff, function | GF07.61-P-3033MNL | ||
| Charging, function | GF09.00-P-2000MNL | ||
| Exhaust treatment function | GF14.00-P-3000MNL | ||
| Electronic accelerator function | GF30.20-P-3015MNL | ||
| On-board refueling vapor recovery function | Engine 176.9, 177.9 in model 217 with code 494 (US version) Engine 176.9, 177.9 in model 222 with code 494 (US version) |
GF47.10-P-3004MNL | |
| Purging function | GF47.30-P-3015MNL | ||
| Purge system with leak test, function | Engine 176.9, 177.9 in model 217 with code 494 (US version) Engine 176.9, 177.9 in model 222 with code 494 (US version) |
GF47.30-P-3017MNL | |
| Overview of system components for gasoline injection and ignition system with direct injection | GF07.70-P-9998MNL |