ME-SFI vehicle features - AH07.61-P-0002-02P
WARNING: This page does not describe the selected car, but rather 202 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz GLA250, and 2019 Mercedes-Benz SLC300. However, it is still accessible from the selected car via links, so may be relevant.
Differences between model 202 and model 203 with gasoline engine
| Model 202 | Model 203 |
|---|---|
| ME-SFI control module with 6 sockets | Shell concept standardized housing with 5 sockets |
| Voltage supply of ME-SFI control module and fuel injection and ignition system through fuse and relay module (K40/4) | Voltage supply of ME-SFI control module and fuel injection and ignition system through front SAM control module with fuse and relay module (N10/1) |
| Fuel pump relay (K27) at fuse box in right of trunk | Fuel pump relay N10/2kA at rear SAM control module with fuse and relay module (in left of trunk) |
| Data link connector 38-pin is located in front right of component compartment. | Data link connector 16-pin is located in left driver footwell. |
| Engine diagnosis malfunction indicator lamp (A1e58) in instrument cluster only engine 112 with EURO3 | Engine diagnosis malfunction indicator lamp (A1e58) in instrument cluster |
| Camshaft Hall sensor detects segment position only when engine is rotating | Camshaft Hall sensor detects segment position when engine not running (quick start function) |
| Pedal value sensor in component compartment | Pedal value sensor integrated in accelerator pedal module |
| Fuel pump in fuel pump assembly | 2-stage fuel pump in fuel delivery module. Installed in fuel tank from above |
| Engine 111: fuel system with fuel return flow from diaphragm pressure regulator at fuel rail Engine 112: single-line system |
Fuel system designed as single-line system, fuel filter with integrated diaphragm pressure regulator |
| Filler neck for fuel tank with separate expansion reservoir Fuel tank located below rear seat. |
Expansion reservoir integrated in fuel tank. Fuel tank located below rear seat. |
| Engine 111 (without |
Engine 111 EVO (without |
| ME-SFI 2.1 fuel injection and ignition system (Bosch) | ME-SFI fuel injection and ignition system (Siemens SIM4 SE/LE) |
| EURO2 or "D3" emission concept (code 923) | Low emission EURO3 emission concept standard (no code) For Germany certified in conformity with emission concept "D4" |
| Oil level indicator switch (S43) | Oil sensor (oil temperature, oil level, oil quality) (B40), installed from below in oil pan |
| 2 twin-spark ignition coils | 4 single ignition coils |
| Spark plugs with copper central electrode | Platinum spark plugs, change interval approx. 100 000 km Engine 111 EVO naturally aspirated: Beru 14 FGH 7 DPURX 2 Engine 111 EVO with supercharger: NGK IFR6D-10 |
| Belt drive and viscous fan clutch: with TAC/AAC electric engine/AC suction fan operated by ME-SFI control module through suction fan control module | Standard electric engine/AC suction fan operated by ME-SFI control module through suction fan control module |
| O2 sensor upstream of catalytic converter | O2
sensor upstream and downstream of underfloor catalytic converter with low emission EURO3 Engine 111 EVO naturally aspirated with "D4": O 2 sensor upstream and downstream of firewall catalytic converter |
| Air gap insulated pipes upstream of TWC | Duplex pipe (double-wall pipe without air gap) and double-wall main muffler housing for reducing structure-borne radiated noise |
| Underfloor catalytic converter | Engine 111 EVO naturally aspirated: with low emission EURO3 only underfloor catalytic converter; with "D4" firewall catalytic converter and reduced underfloor catalytic converter Engine 111 EVO with supercharger: Enlarged catalytic converter cross-section for reducing exhaust backpressure; with "D4" increased volume and higher portion of rare metals in coating |
| Engine 111 naturally aspirated: cruise control with AT | Engine 111 naturally aspirated: cruise control with AT and MT |
| - | Engine 111 naturally aspirated: secondary air injection with electric air pump (M33) |
| Engine 111: air cleaner positioned at vehicle side | Engine 111 EVO: air cleaner positioned at engine side |
| Engine 111 with supercharger: Secondary air injection with supercharger directly downstream of exhaust valves | Secondary air injection with supercharger from air connection on throttle valve actuator (M16/6) downstream of exhaust valves |
| - | Engine 111 EVO with supercharger: Intake manifold pressure sensor (B28) for measuring charge pressure |
| - | Engine 111 EVO with supercharger: Altitude pressure sensor (B18) for measuring ambient pressure |
| Engine 111 with supercharger: Recirculated air flap actuator operated by ME-SFI 2.1 control module by means of PWM signal. | Engine 111 EVO with supercharger: Recirculated air flap actuator operated by ME-SFI control module by means of voltage signal in same way as throttle valve actuator. |
| Engine 111 with supercharger: Supercharger engageable by means of magnetic clutch | Engine 111 EVO with supercharger: Supercharger runs constantly. Bearings optimized. Muffler upstream and downstream of supercharger. |
| Engine 112 | |
| ME-SFI 2.0 fuel injection and ignition system | ME-SFI 2.8 fuel injection and ignition system |
| - | Intake manifold pressure sensor (B28) for detecting altitude at start and for testing exhaust gas recirculation |
| - | Throttle valve actuator with modified contacts |
| O2 sensor heater consumption approx. 18 W in warm state. | O2 sensors of type LSH 4.7 (Bosch). Consumption of sensor heater in warm state is approx. 7 W |
| - | EURO3 emission concept standard (no code); EURO4 with code 926; |
| Crash signal through cable to ME-SFI control module | Crash signal over CAN |