Connect the permanent +12V pin to the positive (+) terminal. Wire your K-Line tool to Plug E Pin 11.
Plug E interfaces the engine with the vehicle chassis. When swapping a Mercedes V6 or V8 engine into a non-Mercedes vehicle, this plug dictates your ignition switch and diagnostic inputs. Switched Ignition (+12V Input from key switch) Pin 5: Throttle Pedal Sensor (Drive-by-Wire) Channel 1 Pin 6: Throttle Pedal Sensor (Drive-by-Wire) Channel 2 Pin 11: K-Line Diagnostics (Connects to OBD2 port Pin 7)
Throttle Position Sensor (TPS) Potentiometer 2 Feedback Plug E: Cabin, Immobilizer, and Diagnostic Interface
CAN Bus, Immobilizer, Diagnostic Port (K-Line/CAN). 2. Verified ME7.5.20 Connector Pinout Mapping
Switch on the line last to initiate the boot sequence. Complete Sensor & Actuator Pin Configuration bosch me20 pinout verified
Camshaft Position Sensor (Hall Effect) Signal 3. Fuel & Ignition Control
Below is the verified pin assignment mapping for the standard Bosch ME20 ECU module. 1. Power Supply and Grounding (Essential for Bench Booting)
Since you mentioned the pinout verification, I’m assuming you are either bench flashing, diagnosing a "bricked" ECU, or building a simulator.
The Bosch ME20 uses a sophisticated immobilizer roll-code system (DAS3). If you are swapping an M112 or M113 engine into an older car or a custom buggy, the engine will start for 2 seconds and immediately die unless you bring over the original ignition switch (EIS), key, and steering lock module. To bypass this, the ECU flash memory must be modified to an "Immo-Off" state, which frees up from requiring factory security data. 2. Splicing Shielded Sensor Lines Connect the permanent +12V pin to the positive (+) terminal
Typically the smallest connector block handling primary voltage.
Both ground pins on Plug 1 must be linked to a single, solid ground point.
Section 3 contains pins for the camshaft sensor (Pin 3), crankshaft sensor (Pins 12, 13), and coolant temperature (Pins 16, 17). Boot Mode & Programming Tips
This essay explores the technical specifics of the Bosch ME20 pinout, verifying its layout and explaining the functions of critical pins to provide a helpful guide for automotive professionals. When swapping a Mercedes V6 or V8 engine
These pins provide the operating voltage and current returns for the internal microprocessor.
The Bosch ME2.0/2.1 series supports a wide range of Mercedes-Benz models: W202 (e.g., C240, C280) W210 (e.g., E320, E430) CLK-Class: Key Technical Considerations Immobilizer (IMMO):
For full vehicle wiring or troubleshooting sensor faults, use this verified mapping of the primary engine vital signals. 1. Power Supply and Ground Circuit Circuit 15 (Ignition On +12V) Plug 1, Pin 2: Circuit 30 (Constant Battery +12V) Plug 1, Pin 4: Chassis Ground Plug 1, Pin 9: Engine Block Ground 2. Engine Position Sensors Plug 2, Pin 1: Crankshaft Position Sensor (L5) Signal (+) Plug 2, Pin 2: Crankshaft Position Sensor (L5) Signal (-)
Automotive electrical systems can be unforgiving of simple mistakes. A misidentified power or ground connection can easily damage the ECU. When in doubt, consult a professional.
Fuel Injectors, Ignition Coils, Throttle Body (DBW), Fuel Pump Relay.