in category: ECU Engine controller MERCEDES BENZ
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Mercedes-Benz ECU engine controllers manage fuel injection, ignition, turbocharger operation, emissions systems and communication with the vehicle’s drive authorisation system. ECUSale offers tested engine control units for Mercedes-Benz passenger cars, SUVs and vans, including selected A-Class, B-Class, C-Class, E-Class, S-Class, CLK, CLS, SL, SLK, ML, GL, Vito, Viano and Sprinter models.
Many Mercedes-Benz engine ECUs in our range are supplied in VIRGIN condition. Data from the previous vehicle has been reset, allowing the module to be personalised, synchronised and coded using Mercedes Star Diagnosis or Xentry. A VIRGIN ECU is not normally ready to operate immediately after being connected to the vehicle.
Before ordering, compare the complete Mercedes-Benz OEM number, such as A6461500577, with the full Bosch, Continental, Siemens, VDO or Delphi number shown on the original module. The engine type or vehicle model alone is not sufficient to confirm compatibility.
Not sure which Mercedes-Benz ECU you need?
Send us a clear photograph of the complete ECU label together with the VIN. We will help you check the part numbers and determine whether a VIRGIN module, cloning or another preparation method is suitable.
A Mercedes-Benz engine control unit, also known as an ECU, ECM or engine computer, controls essential engine functions such as fuel injection, ignition, turbocharger operation, EGR, DPF regeneration and communication with other electronic modules.
ECUSale supplies original, tested Mercedes-Benz engine controllers for diesel and petrol vehicles. The range includes modules for selected A-Class, B-Class, C-Class, E-Class, S-Class, CLK, CLS, SL, SLK, ML, GL, GLC, Vito, Viano and Sprinter models. Availability depends on the complete OEM number, ECU manufacturer, engine version, hardware and installed software.
Need help identifying your Mercedes-Benz ECU?
Send a photograph showing the entire label of your original controller and provide the vehicle’s VIN. We will compare the Mercedes-Benz and manufacturer numbers and help you select the appropriate module.
A significant part of our range consists of Bosch engine controllers for Mercedes-Benz vehicles equipped with 2.2 CDI diesel engines. These modules were installed in numerous passenger cars and vans, including selected Sprinter, Vito and Viano versions.
One example is the A6461500577 / Bosch 0281014203 Mercedes 2.2 CDI CR4.20 VIRGIN ECU. It is supplied reset and prepared for personalisation using Mercedes Star Diagnosis or Xentry.
Another available version is the A6461507272 / Bosch 0281015062 Mercedes 2.2 CDI OM646 VIRGIN ECU. The OM646 engine designation alone does not confirm compatibility. Both the Mercedes-Benz OEM number and the complete Bosch number should be compared with the original controller.
Different CR4.20 and CR4.21 controllers can have similar housings and connectors while containing different hardware or software. They should not be selected solely according to engine capacity, vehicle model or production year.
The Mercedes-Benz OM642 3.0 CDI engine was used in many passenger cars, SUVs and vans. Several ECU variants were fitted depending on the model, emissions standard, power output, gearbox and production period.
The range includes the A6429002900 / Bosch 0281016383 Mercedes 3.0 CDI OM642 CR6P.15 VIRGIN ECU. The controller has been reset, but it must still be correctly personalised, programmed and coded after installation.
When selecting an OM642 controller, check the complete Mercedes-Benz A-number, Bosch number, ECU family, hardware and software version. “Mercedes 3.0 CDI ECU” is not a sufficiently precise part description.
Looking for a Mercedes-Benz CDI ECU?
Compare every number on the original label. Two ECUs designed for the same engine family may contain different hardware, software or vehicle configurations.
ECUSale also offers Bosch controllers for selected Mercedes-Benz petrol engines, including V6 units from the M112, M272 and M276 families.
The A2721533291 / Bosch 0261209220 Mercedes-Benz ME9.7 VIRGIN engine control unit is intended for selected vehicles equipped with an M272 petrol engine. Compatibility must be established from the complete numbers and the vehicle configuration.
Available M276 controllers include the A2769001600 / Bosch 0261S06497 Mercedes 3.5 V6 M276 VIRGIN ECU and the A2769005000 / Bosch 0261S07801 Mercedes W204 3.5 V6 VIRGIN ECU.
Although both controllers may be associated with a 3.5-litre M276 engine, they are not automatically interchangeable. The complete OEM and Bosch references, hardware, software, model generation and equipment configuration must be verified.
For selected Mercedes-Benz B-Class W245 vehicles, the range includes the A6409003700 / Bosch 0281017236 Mercedes B200 CDI W245 VIRGIN ECU.
Before ordering, confirm that both numbers match the original controller. The B200 CDI model designation alone does not identify the exact engine computer because different controllers may have been fitted during the model’s production.
The most reliable identification method is to compare all numbers printed on the original ECU label. The vehicle model, engine capacity, power output and production year are helpful, but they are not sufficient on their own.
Before purchasing, check:
The VIN helps identify the vehicle but does not replace the numbers printed on the original module. For example, a Mercedes-Benz number such as A6461507272 should be checked together with Bosch number 0281015062.
A VIRGIN Mercedes-Benz ECU has been reset and cleared of the relevant assignment data from the previous vehicle. This allows a compatible controller to be personalised and integrated with another vehicle.
VIRGIN does not mean that the ECU will operate immediately after being connected. Depending on the model and controller type, installation may require:
These procedures should be performed by an experienced Mercedes-Benz specialist using Star Diagnosis or Xentry and a stable external power supply.
The engine ECU communicates with the vehicle’s drive authorisation components. Depending on the model, these may include the key, EIS/EZS ignition module, transmission controller, ISM selector module and other control units.
Incorrect personalisation, missing coding, low voltage during programming or a communication fault in another module may prevent the engine from starting even when the replacement ECU itself is working correctly.
ECUSale does not offer Mercedes-Benz engine controllers with IMMO OFF. The correct replacement methods for the controllers in this category are VIRGIN preparation followed by authorised personalisation and coding, or cloning when technically possible.
Cloning involves transferring the required memory and configuration data from the original ECU to a compatible replacement controller. Depending on the ECU type, this can include EEPROM, FLASH, processor data, VIN, software, configuration and drive authorisation information.
Cloning may reduce the amount of work required after installation, but it is only possible when:
If the original module is severely damaged or its data cannot be recovered, a correctly selected VIRGIN controller followed by programming with Xentry or Star Diagnosis is usually the appropriate solution.
The engine controller exchanges data with the automatic transmission ECU, EGS/TCM and, in selected models, the Intelligent Servo Module. A vehicle that remains in P, does not recognise the selected gear, returns to N or records CAN communication faults does not necessarily have a defective engine ECU.
When replacing an ISM or transmission module, the required procedure may include calibration of the selector, programming or adaptation of the transmission controller, fault clearing and a complete communication test. More information is available in our guide to Mercedes A1644460710 ISM failure, VIRGIN preparation and cloning.
These symptoms can also be caused by damaged wiring, poor grounds, missing power supplies, faulty relays, sensors, injectors or other electronic modules. A complete vehicle diagnosis should be carried out before ordering a replacement engine ECU.
A replacement controller should not be installed before the original cause of electrical damage has been identified. A short circuit or charging-system fault can damage the replacement ECU as well.
Engine starting and vehicle operation depend on communication between several electronic systems. In addition to engine ECUs, ECUSale offers Mercedes-Benz ABS pumps and brake control modules.
If the vehicle has braking-system warnings, wheel-speed sensor faults, no communication with the ABS controller or recurring CAN errors, diagnose the ABS/ESP system separately rather than assuming that the engine ECU is responsible.
Before ordering, you can review our purchasing information, available payment methods, delivery times and shipping costs and returns and complaints policy.
Find the correct Mercedes-Benz engine ECU
Compare every number on your original controller or send us a photograph of its complete label. We will help you identify a compatible ECU and the appropriate preparation method.
The safest option is an ECU with the same complete Mercedes-Benz OEM number and a matching manufacturer number. Some modules have recognised replacement numbers, but compatibility must be confirmed before purchase.
No. A VIRGIN ECU normally requires personalisation, drive authorisation synchronisation, suitable software and coding using Mercedes Star Diagnosis or Xentry before the vehicle can be started and operated correctly.
The exact procedure depends on the ECU and vehicle generation. It may include initial commissioning, VIN entry, personalisation, software flashing, variant coding and SCN coding. The work should be carried out by a Mercedes-Benz specialist using Xentry or Star Diagnosis.
No. We do not offer IMMO OFF for Mercedes-Benz engine controllers. We supply compatible modules prepared as VIRGIN for correct personalisation and programming, or offer cloning when the original ECU data can be recovered.
Cloning may be possible if the original controller remains readable and the replacement module is compatible. The original ECU may need to be sent for inspection and data transfer.
The VIN is useful for identifying the vehicle, but it does not replace the part numbers on the controller. Send the VIN together with a clear photograph of the complete original ECU label.
It depends on the engine version, model, production year, emissions standard and original part numbers. Several CR4.20, CR4.21 and other controllers were used in 2.2 CDI vehicles. Engine capacity alone is not sufficient.
Compare the complete Mercedes-Benz A-number, manufacturer number, ECU family, hardware and software. Different OM642 applications may use controllers that are not interchangeable.
Yes. The engine ECU communicates with the transmission controller, ISM and drive authorisation system. CAN faults, a defective selector module or missing transmission adaptation can cause no-start, gear-selection and communication errors.
No. A no-start condition may also be caused by missing power or ground, wiring damage, CAN communication faults, key or EIS/EZS problems, transmission authorisation faults, fuel-system defects or another failed electronic module.
Send a photograph of the complete ECU label, the VIN, vehicle model and generation, production year, engine code and capacity, power output, gearbox type and diagnostic fault codes.
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