A6421501272 / 0281014204 – Mercedes 3.0 CDI CR4.30 VIRGIN engine control unit
The offered engine control unit with numbers A6421501272 and 0281014204 is a Bosch CR4.30 unit prepared in VIRGIN state. The module is cleared of immobilizer data and ready for first start in the vehicle after completing the programming procedure using Xentry / Star Diagnosis. This is a safe solution in case of original ECU failure or communication problems.
Application
This ECU is used in Mercedes vehicles with the 3.0 CDI V6 (OM642) engine. Depending on equipment version it can be found for example in:
- E-Class (W211 / W212)
- C-Class (W204)
- S-Class (W221)
- ML / GL / R
Typical years: around 2006–2013 (depending on calibration and software number).
VIRGIN version – what does it mean?
The unit has no VIN stored and no synchronization with the immobilizer. After installation it must be assigned to the vehicle online or offline via Xentry / Star Diagnosis. For workshops without access to coding we also offer a cloning service of the content from the damaged module.
Typical failure symptoms
- engine cannot be started
- no communication via OBD
- random injection faults despite correct wiring
- engine stalls while driving
- no control of relays or cooling fans
FAQ
Is A6421501272 ready to drive after installation?
No – this is a VIRGIN version. After installation programming in Xentry or Star Diagnosis is required.
Can 0281014204 be installed without coding?
Only after cloning data from the original ECU. Otherwise adaptation is required.
I have a damaged A6421501272 module – can the data be transferred?
Yes, in most cases it is possible to copy FLASH and EEPROM, so the vehicle will start without additional procedures.
How to choose the correct 0281014204 ECU?
It is best to compare the Bosch part number and the Mercedes number from the label or send them for verification before purchase.
Each engine control unit passes a power supply and communication test before shipping.