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Bosch ME2

Bosch ME2 — Identify the correct ECU reference and compatibilities

Learn how to read the markings of a Bosch ME2 ECU (manufacturer reference, Bosch number, HW/SW) and avoid part errors. Request your personalized quote.

1 references availableRepair · Used units · Reprogramming6-month warranty

Your petrol engine is showing ECU symptoms and you need to precisely identify a Bosch ME2? This ECU family manages injection and ignition on many engines with electronic throttle. To avoid any errors, start by noting all the markings on the case label: vehicle manufacturer reference, Bosch number, HW/SW codes, and the serial number. Depending on the versions, additional information is silk-screened inside (PCB) and may differ from the external label. Do not use a 'close' variant: a Bosch ME2 is not interchangeable from one sub-reference to another, only the exact reference is suitable. Then use the page configurator (search by HW/SW reference or by vehicle) to find the exact part. If your unit is faulty, INCARLINE can, depending on the case, offer a repair, Bosch ME2 cloning, or a paired replacement.

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Search by hardware reference, software reference or control unit name. Click a result to configure and order without leaving the page.

1 reference

Technical sheet of this family

The Bosch ME2 is an engine control unit (ECM) for multi-point petrol engines with electronic throttle management and lambda sensor control. Typical of its generation, it relies on a 16 to 32-bit microcontroller and combines flash memory for software/calibration and non-volatile memory (often serial EEPROM type) dedicated to identifiers like the VIN and immobilizer data. This architecture allows diagnostic, adaptation, and pairing operations when the vehicle and ECU are compatible.

On the communication side, the Bosch ME2 commonly supports OBD-II diagnostic protocols via the K-Line (ISO 9141/ISO 14230) and, depending on the versions and the vehicle network, CAN bus exchanges may be present for coordination with other ECUs. The sub-references (e.g., ME2.8.1) reflect hardware and software variants specific to an engine and a manufacturer. For any intervention (Bosch ME2 repair, Bosch ME2 cloning, Bosch ME2 replacement), fine identification of HW/SW codes is crucial to avoid pairing defects or an impossible start.

On the external label of the Bosch ME2, you will generally find: the manufacturer reference (specific to the vehicle brand), the Bosch number, one or more software codes (SW), and sometimes a hardware mention (HW). Inside, the board may bear a hardware revision marking and a production software sticker. Software updates modify the SW without changing the hardware, but compatibility remains strictly linked to the exact combination of identifiers.

Concerned vehicles

The Bosch ME2 equips many widely distributed petrol models, notably atmospheric V6 and V8 engines from the late 1990s and early 2000s. Always check on your unit and use the configurator to confirm the presence of a Bosch ME2 on your specific vehicle.

  • Mercedes-Benz E-Class (W210) — V6/V8 petrol engines (M112/M113 families) — years depending on version
  • Mercedes-Benz C-Class (W203) — V6 petrol engines (M112 family) — years depending on version
  • Mercedes-Benz S-Class (W220) — V8 petrol engines (M113 family) — years depending on version
  • Mercedes-Benz ML (W163) — V6/V8 petrol engines (M112/M113 families) — years depending on version
  • Mercedes-Benz CLK (W208) — V6/V8 petrol engines (M112/M113 families) — years depending on version
  • Mercedes-Benz SL (R230, early generations) — V8 petrol engines (M113 family) — years depending on version

This list illustrates frequently encountered installations for the Bosch ME2, without substituting for reference verification. Variations exist depending on markets, years, equipment levels, and software evolutions.

Points of caution

A Bosch ME2 is not interchangeable between close variants: only the exact combination of manufacturer reference + Bosch number + HW/SW pair ensures compatibility. Before any order, precisely note these elements on the external label and, in case of doubt, compare with internal markings. The most critical differences often concern the HW code (hardware platform) and SW versions specific to engine calibration and vehicle immobilizer.

To identify the correct part, use the configurator on this page: search by HW/SW reference or by vehicle, then validate the correspondence of the visible markings on your unit. In the presence of a faulty Bosch ME2, it is possible, in many cases, to transfer immobilizer/identity data from the old ECU to a strictly identical replacement (cloning), provided the references match. INCARLINE can perform, when relevant, pairing by cloning or offer a repair on your Bosch ME2 after diagnosis.

Typical symptoms of a failing Bosch ME2 (non-exhaustive list): random or impossible start, limp mode activation, engine warning lights with codes related to ECU management, misfires perceived while ignition and injection are functional, or unexpected cut-offs when hot. These signs alone are not conclusive: first eliminate peripheral causes (power supply, ground, sensors/actuators) and entrust the ECU to specialized control if necessary.

In summary, for a Bosch ME2: note all identifiers (manufacturer, Bosch, HW, SW, serial number), check internal markings if the unit has already been opened, and use the configurator to secure the match before any Bosch ME2 repair, Bosch ME2 cloning, or Bosch ME2 replacement. This rigor avoids immobilizer incompatibilities and time losses in the workshop.

Frequently asked questions

How do I know if my Bosch ME2 ECU is the correct reference for my vehicle?
Compare your unit's label with the product page: vehicle manufacturer reference, Bosch number, HW/SW codes, and serial number must match. If in doubt, use the configurator (search by HW/SW or by vehicle) and only validate if all markings match.
Where can I find the manufacturer reference and Bosch number on a Bosch ME2?
These details are on the external label of the unit: the manufacturer reference (specific to the vehicle brand), the Bosch number, software codes (SW), and sometimes a hardware code (HW). On some units, internal markings on the PCB confirm the hardware revision.
Can a Bosch ME2 be cloned without going to the dealership?
Bosch ME2 cloning is possible when you have a strictly identical donor (Bosch number and HW/SW identical). Identity data (VIN, immobilizer) is then transferred from the original ECU. Feasibility depends on the memory read state and reference consistency.
Which vehicles are most often equipped with a Bosch ME2 ECU?
The Bosch ME2 is frequently found on Mercedes-Benz V6/V8 petrol models from the late 1990s to early 2000s (e.g., M112/M113 engine families). However, check your unit's label to confirm the presence of this family on your model.
What is the difference between external and internal markings on a Bosch ME2?
The external label indicates the manufacturer reference, Bosch number, and SW/HW codes used for commercial identification. Internally, the board may display a hardware revision and a production software sticker; these markings confirm the technical variant if the label has been replaced or damaged.
My Bosch ME2 has a different SW code but the same Bosch number: is it compatible?
Compatibility is not guaranteed. On the Bosch ME2, the exact combination of Bosch number + HW + SW is crucial, especially for the immobilizer. It is recommended to match all identifiers before any installation attempt.
What should I do in case of a Bosch ME2 ECU failure on my petrol vehicle?
Start by noting all references (manufacturer, Bosch, HW/SW). Check the power supply, grounds, and peripherals. If the Bosch ME2 is at fault, look for a unit with strictly identical references and consider cloning to retain the identifier and immobilizer. Use the configurator to secure your choice.

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