Mercedes Benz 204 Engine Control Units

The gasoline injection and ignition system (engine control) is controlled by the engine control unit (ME-SFI [ME] control unit). ME-SFI [ME] control unit 9.7, version "Bosch ME 9.7 AMG", is used for the AMG 6.3-liter naturally aspirated V8 engine and the control unit is specially tuned for the properties of this high performance engine.
The software in ME-SFI [ME] control unit 9.7 is flashable, making the control unit flexible and allowing it to be kept up-to-date with technological developments.
The following systems are controlled and coordinated by ME-SFI [ME] control unit 9.7:
• Ignition system
• Injection system
• Idle speed control
• Torque interface
• Alternator interface (LIN)
• Evaporative emission control system
• Thermal management
• Starter control
• Immobilizer and drive authorization system (DAS 3)
• Diagnosis and fault storage
• Emission control
ME-SFI [ME] control unit 9.7 evaluates the following information for the engine control system:
• Air mass
• Coolant temperature
• Engine speed and crankshaft position
• Throttle valve position
• Accelerator pedal position
• Intake manifold pressure
• Intake air temperature
• Fuel pressure
• Fuel tank pressure (with code (494) USA version)
• Position of intake and exhaust camshafts
• Alternator interface
• Engine knocking
• Oil level
• Oil temperature
• O2 concentration upstream and downstream of firewall catalytic converter
Other input signals that ME-SFI [ME] control unit 9.7 receives from other control units via the CAN data bus (Controller Area Network) include:
• Vehicle speed
• Torque requests
• Gear range and gear recognition
• Cruise control or DISTRONIC commands
• Braking recognition
• Steering angle
• Start enable (drive authorization system)
• Crash signal
• Fuel level
· A1 Instrument cluster
· N2/10 Supplemental restraint system control unit
· N3/10 ME-SFI [ME] control unit 9.7
· N10/1 Front SAM control unit with fuse and relay module
· N10/2 Rear SAM control unit with fuse and relay module
· N22/7 Automatic air conditioning control and operating unit
· N30/4 Electronic Stability Program control unit
· N73 Electronic ignition lock control unit
· N80 Steering column module control unit
· N118/3 Left fuel pump control unit
· N118/4 Right fuel pump control unit
· Y3/8 Fully integrated transmission control unit
· X11/4 Diagnostic connector
· CAN B Interior CAN
· CAN C Drivetrain CAN
· CAN D Diagnostic CAN
· CAN E Chassis CAN
· 1 Intake manifold
· 2 Fuel feed unit
· 2/2 Fuel filter with pressure limiting valve
· 3 Fuel tank
· 4 Fuel line to fuel distribution rail
· 5 Firewall catalytic converter
· A16/1 Right knock sensor
· A16/2 Left knock sensor
· B1 Oil temperature sensor
· B2/6 Left hot film mass air flow sensor
· B2/7 Right hot film mass air flow sensor
· B4/3 Fuel tank pressure sensor (with code (494) USA version)
· B4/15 Fuel pressure sensor
· B6/4 Left intake camshaft Hall sensor
· B6/5 Right intake camshaft Hall sensor
· B6/6 Right exhaust camshaft Hall sensor
· B6/7 Left exhaust camshaft Hall sensor
· B11/4 Coolant temperature sensor
· B17 Intake air temperature sensor
· B28 Pressure sensor
· B37 Accelerator pedal sensor
· B70 Crankshaft Hall sensor
· G2 Alternator
· G3/3 Left oxygen sensor upstream of catalytic converter
· G3/4 Right oxygen sensor upstream of catalytic converter
· G3/5 Left oxygen sensor downstream of catalytic converter
· G3/6 Right oxygen sensor downstream of catalytic converter
· K25 Oil cooler fan motor relay
· M1 Starter
· M3 Right fuel pump
· M3/2 Left fuel pump
· M4/1 Oil cooler fan motor
· M4/7 Combustion engine and air conditioning with integrated control fan motor
· M16/3 Front throttle valve actuator
· M16/4 Rear throttle valve actuator
· M33 Electric air pump
· N3/10 ME-SFI [ME] control unit 9.7
· N10/1kM Circuit 50 relay, starter
· N10/1kN Circuit 87 relay, engine
· N10/1kP Secondary air injection relay
· N118/3 Left fuel pump control unit
· N118/4 Right fuel pump control unit
· R48 Coolant thermostat heating element
· S43 Oil level check switch
· T1/1- T1/8 ignition coils, cylinders 1 to 8
· X11/4 Diagnostic connector
· Y16/2 Heating system shutoff valve
· Y22/6 Intake manifold switchover valve
· Y32 Air pump switchover valve
· Y49/4 Left intake camshaft solenoid
· Y49/5 Right intake camshaft solenoid
· Y49/6 Left exhaust camshaft solenoid
· Y49/7 Right exhaust camshaft solenoid
· Y58/1 Purge valve
· Y58/4 Activated charcoal filter shutoff valve (with code (494) USA version)
· Y62 Injection valves, cylinders 1 to 8
· CAN C Drivetrain CAN
· CAN D Diagnostic CAN
· LIN C1 Drivetrain LIN

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