0281017236 A6409003700 Engine ECU for Mercedes B-Class W245 B200 CDI 2.0
The offered Bosch engine ECU 0281017236 with Mercedes part number A6409003700 is designed for the Mercedes-Benz B-Class W245 B200 CDI 2.0. The unit is supplied in VIRGIN condition, meaning it has been reset and prepared for programming and adaptation to another vehicle.
This is not a Plug & Play version. After installation, the ECU requires programming and coding to the vehicle using suitable diagnostic equipment, most commonly Mercedes Star Diagnosis / Xentry. During the adaptation process, the control unit must be synchronized with the immobilizer system and vehicle configuration.
Compatibility – 0281017236 A6409003700 ECU
- Mercedes-Benz B-Class W245
- B200 CDI 2.0 diesel
- OM640 engine family
- typically production years: 2005–2011
- Bosch / Mercedes CR40 engine control unit
Before purchasing, compare the part number from your original ECU label. The key references to verify are 0281017236 and A6409003700. Matching the part number is the safest way to ensure compatibility.
ECU preparation
The ECU has been fully tested, communication checked, and prepared in VIRGIN condition. This means it can be adapted again to another vehicle but requires programming after installation.
Possible symptoms of a faulty engine ECU
- no communication with the engine ECU,
- engine will not start,
- immobilizer or start authorization faults,
- injector power supply problems,
- irregular engine operation on the B200 CDI,
- CAN communication errors or no start permission,
- check engine light and stored ECU fault codes.
Programming after installation
After installing the 0281017236 / A6409003700 ECU, adaptation must be carried out in the vehicle. The recommended tools are Mercedes Star Diagnosis or Xentry. The process generally involves installing the ECU, connecting to the vehicle, performing engine ECU adaptation, and synchronizing it with the immobilizer system.
FAQ – 0281017236 A6409003700 Engine ECU Mercedes B-Class W245
Is ECU 0281017236 compatible with Mercedes B-Class W245 B200 CDI?
Yes, the 0281017236 engine ECU is used in Mercedes-Benz B-Class W245 B200 CDI 2.0 models equipped with the OM640 diesel engine. However, the Bosch and Mercedes part numbers should always be compared before purchase.
Is A6409003700 ready for installation without coding?
No. The A6409003700 ECU is prepared in VIRGIN condition but is not Plug & Play. Programming and adaptation to the vehicle are required after installation.
Which tool is required to program the Mercedes B200 CDI W245 ECU?
For ECU adaptation in the Mercedes B-Class W245 B200 CDI, Mercedes Star Diagnosis / Xentry is recommended. It allows synchronization with the immobilizer system and vehicle configuration.
Does Bosch ECU 0281017236 require immobilizer programming?
Yes. Since the ECU is supplied as VIRGIN, it must be coded and synchronized with the immobilizer after installation.
How can I verify compatibility of ECU A6409003700?
The best method is to compare the part number from the original ECU label. The key references are 0281017236, A6409003700, and the CR40 ECU designation.
Does this ECU fit Mercedes B-Class 2.0 CDI?
This ECU may fit the Mercedes B-Class W245 B200 CDI 2.0, but compatibility should always be confirmed by matching the part number. Vehicle model alone is not enough.
Is ECU 0281017236 tested before shipping?
Yes. Every ECU is tested before dispatch, communication is checked, and the unit is prepared for further adaptation in the vehicle.
