Virgin ECU engine controller Mercedes A6461501977 / Bosch 0281014347 – ready for programming
We offer an original Mercedes A6461501977 / Bosch 0281014347 CR4.20 ECU engine controller prepared in VIRGIN condition. The module has been cleared of all previous vehicle data and restored to factory state, allowing it to be programmed and adapted again to another vehicle.
The ECU engine controller has been fully electronically tested and prepared for adaptation using Mercedes Star Diagnosis / Xentry. After correct coding, the module operates like a factory-new ECU.
Application of the A6461501977 / 0281014347 ECU
This module was used in Mercedes-Benz 2.2 CDI OM646 vehicles, including:
- Mercedes E-Class W211 / S211 2.2 CDI
- Mercedes C-Class W203 / S203 220 CDI
- Mercedes Vito / Viano W639 2.2 CDI
- Mercedes Sprinter 2.2 CDI
- Mercedes CLK W209 220 CDI
Compatibility should always be confirmed using the part numbers: A6461501977 and 0281014347.
Common symptoms of CR4.20 ECU failure
- no communication with the ECU engine controller,
- vehicle does not start despite correct power supply,
- immobiliser faults or no start authorisation,
- engine stalling while driving,
- problems after water damage or electrical wiring faults,
- multiple sensor faults appearing simultaneously,
- unstable ECU voltage or main relay faults.
Questions and Answers (Q&A)
Is the A6461501977 ECU Plug & Play?
No. This is a VIRGIN version, therefore the module requires programming and adaptation to the vehicle using Mercedes Star Diagnosis.
Which engine is Bosch 0281014347 compatible with?
This ECU is mainly used in Mercedes 2.2 CDI OM646 engines. Compatibility should always be verified using the A6461501977 and 0281014347 part numbers.
Can the CR4.20 ECU be reprogrammed?
Yes. The module has been prepared in VIRGIN condition, allowing it to be safely coded to another vehicle.
How do you program the Mercedes A6461501977 ECU?
Adaptation requires Mercedes Star Diagnosis / Xentry or a compatible programmer capable of coding CDI CR4.20 ECUs.
What are the symptoms of a faulty 0281014347 ECU?
The most common symptoms include no communication with the ECU, inability to start the engine, immobiliser faults, ECU power supply issues and random sensor errors.
Does the Bosch 0281014347 number need to match exactly?
Yes. For Mercedes CDI ECUs, matching both the Bosch and Mercedes part numbers is extremely important, therefore identical references are strongly recommended.
