View of engine from top front |
1 | Air cleaner housing |
N3/10 | ME-SFI [ME] control unit |
P07.70-2418-76
Location
The ME-SFI control unit is behind the air filter housing.
On vehicles up to model year 2016 one suspension CAN is present independently of the equipment.
On vehicles as of model year 2016 one suspension CAN is present depending on equipment installed.
Variant 1
If the vehicle does not have equipment codes named in variant 2, one suspension CAN (CAN E) is present as up to model year 2016.
Variant 2
If the vehicle has one of the following equipment codes, there are two chassis CANs (chassis CAN 1 (CAN E1) and chassis CAN 2 (CAN E2)) present:
Code 218 (Reversing camera)
Code 234 (Blind Spot Assist)
Code 459 (Steel suspension with adjustable damping)
Code 475 (Tire pressure monitor)
Code 476 (Lane Keeping Assist)
Code 513 (Speed Limit Assist)
Code 614 (Bi-xenon headlamps)
CODE 615 (Bi-xenon headlamp with active curve lights)
CODE 618 (Bi-xenon headlamp)
Code 621 (Intelligent Light System (left-hand traffic))
code 622 (Intelligent Light System)
Code 631 (Static LED headlamps for left-hand traffic system)
Code 632 (Static LED headlamps for right-hand traffic system)
Tasks
The ME-SFI [ME] control unit fulfills the following tasks:
Controlling the engine basic functions
Reading in of signals
Evaluation of input factors
Output of signals and actuation of components
The ME-SFI [ME] control unit also acts as the interface (gateway) between the connected CAN bus systems.
Controlling the engine basic functions
Exhaust treatment
Diagnosis and fault storage
Electronic accelerator
Drive authorization system and immobilizer
Alternator interface
Regulated camshaft adjustment
high pressure gasoline injection
Fuel supply
Charge pressure control
Torque interface
ECO start/stop function
Heat management
Ignition system
Reading in of signals
Input factors are read in over the following connections:
Direct line
Drive-LIN (LIN C1)
Drive train CAN (CAN C)
Chassis CAN or chassis CAN 1 and chassis CAN 2
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
Direct line
Drive train LIN
Drive train CAN
Chassis CAN or chassis CAN 1 and chassis CAN 2
The input factors and initial parameters for the following component parts are read in or output via direct lines by the ME-SFI [ME] control unit and processed by the engine management:
Input factors over a direct line from | Output factors over a direct line to | Supplemental information |
Knock sensor 1 (A16/1) | - | - |
Knock sensor 2 (A16/2) | - | - |
Engine oil temperature sensor (B1) | - | - |
Fuel tank pressure sensor (B4/3) | - | With CODE 460 (Canada version) or CODE 494 (USA version) |
Purging pressure sensor (B4/4) | - | - |
Fuel pressure and temperature sensor (B4/25) | - | - |
Intake camshaft Hall sensor (B6/15) | - | - |
Exhaust camshaft Hall sensor (B6/16) | - | - |
Coolant temperature sensor (B11/4) | - | - |
Charge air temperature sensor downstream of throttle valve (B17/9) | - | - |
Pressure sensor downstream of air filter (B28/5) | - | - |
Pressure sensor upstream of throttle valve (B28/6) | - | - |
Pressure sensor downstream of throttle valve (B28/7) | - | - |
Accelerator pedal sensor (B37) | - | - |
Crankshaft Hall sensor (B70) (with rotational direction recognition) | - | - |
Gasoline particulate filter differential pressure sensor (B163/3) | - | Model 117, 156 with code 598 (gasoline particulate filter (OPF) with sensor system) |
On-board electrical system battery (G1) | - | - |
Oxygen sensor sensor element downstream of catalytic converter (G3/1b1) | - | - |
- | Oxygen sensor heater downstream of catalytic converter (G3/1r1) | - |
Oxygen sensor sensor element upstream of catalytic converter (G3/2b1) | - | - |
- | Oxygen sensor heater upstream of catalytic converter (G3/2r1) | - |
Circuit 15 relay (F58kR) | - | - |
Starter circuit 50 relay (F58kM) | Starter circuit 50 relay (F58kM) | - |
Circuit relay87M (F58kN) | Circuit relay87M (F58kN) | - |
- | Circuit 87 relay (F58kS) | - |
Fan motor (M4/7) | Fan motor (M4/7) | - |
- | Actuator motor (M16/6m1), throttle valve | - |
Actual value potentiometer 1 (M16/6r1), throttle valve | - | - |
Actual value potentiometer 2 (M16/6r2), throttle valve | - | - |
- | SOGE actuator motor (M16/58) | With code U21(AMG Performance exhaust system) |
- | Exhaust gas flap actuator motor (M16/59) | - |
Supplemental Restraint System control unit (N2/10) | - | - |
SAM control unit (N10) | - | - |
- | Fuel system control unit (N118) | - |
- | Coolant thermostat heating element(R48) | - |
Oil level check switch (S43) | - | - |
- | Cylinder 1 ignition coil (T1/1) | - |
- | Cylinder 2 ignition coil (T1/2) | - |
- | Cylinder 3 ignition coil (T1/3) | - |
- | Cylinder 4 ignition coil (T1/4) | - |
- | Intake camshaft solenoid (Y49/1) | - |
- | Exhaust camshaft solenoid (Y49/2) | - |
- | Purging switchover valve (Y58/1) | - |
- | Partial load operation crankcase ventilation system valve (Y58/2) | - |
- | Activated charcoal canister shutoff valve (Y58/4) | With CODE 460 (Canada version) or CODE 494 (USA version) |
- | Cylinder 1 fuel injector (Y76/1) | - |
- | Cylinder 2 fuel injector (Y76/2) | - |
- | Cylinder 3 fuel injector (Y76/3) | - |
- | Cylinder 4 fuel injector (Y76/4) | - |
- | Boost pressure control pressure transducer (Y77/1) | - |
- | Quantity control valve (Y94) | - |
- | Engine oil pump valve (Y130) | - |
The input factors and initial parameters from the following component parts and control units are sent or received by the ME-SFI [ME] control unit via the LIN or CAN and are used by the engine management:
Input factors via the drive LIN (LIN C1) from | Output factors via the drive LIN (LIN C1) to | Supplemental information |
Alternator (G2) | Alternator (G2) | - |
Input factors over drive CAN (CAN C) from | Initial parameters over drive CAN (CAN C) to | Supplemental information |
Dual-clutch transmission fully integrated transmission control unit (Y3/14n4) | Dual-clutch transmission fully integrated transmission control unit (Y3/14n4) | - |
Fuel system control unit (N118) | Fuel system control unit (N118) | - |
Input factors via chassis CAN (CAN E) (variant 1) or via chassis CAN 1 (CAN E1) (variant 2) from | Initial parameters via chassis CAN (CAN E) (variant 1) via chassis CAN 1 (CAN E1) (variant 2) to | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | via chassis CAN 2 (CAN E2) and electronic ignition lock control unit (N73) |
DISTRONIC electric controller unit (A89) (with code (239) DISTRONIC PLUS)) | - | - |
Supplemental Restraint System control unit (N2/10) | - | - |
SAM control unit (N10) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
AAC control and operating unit (N22/7) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Electronic Stability Program control unit (N30/4) | - | - |
Left front door control unit (N69/1) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Upper control panel control unit (N72/1) | - | Via battery sensor LIN (LIN B15), SAM control unit (N10), interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
Steering column tube module control unit (N80) | - | - |
Structure
The ME-SFI [ME] control unit housing is made out of diecast aluminum and the cover is made out corrosion-protected sheet steel. The ME-SFI [ME] control unit is water and dust protected.
The inside contains the 32-bit measuring and control electronics for the engine management.
Voltage supply
The ME-SFI [ME] control unit is supplied with a power via "circuit 30 secured" and also for ignition ON via "circuit 87 M4".
In the operating voltage range it has both short-circuit protection and reversed polarity protection.
Power is supplied through several pins connected in parallel to relieve the electrical connection.
Ground connection
"Circuit 31" ground connection is connected through multiple ground lines to the firewall ground point (W11).
Variants
The variants of the engine management, such as country and exhaust variants, are activated with the vehicle diagnosis system via variant coding.
Exchange of the ME-SFI [ME] control unit is not necessary.