Vendors's code: A6421502877
Product code: 0281013977
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Shipping costs are not included in the price.
express delivery 3-6 days
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Engine control unit (ECU) in Virgin (reset) mode, prepared for quick adaptation in Mercedes 3.0 CR4.12 vehicles. Part numbers: A6421502877, 0281013977.
The engine ECU A6421502877 / 0281013977 is an original unit used in Mercedes vehicles with the 3.0 CDI engine. It has been prepared in Virgin (reset) mode, which means it can be quickly and easily programmed after installation using the PIN code and OEM diagnostic tools.
This ECU fits the following models:
Engine type: OM642 3.0 CDI CR4.12
A Virgin ECU contains no stored immobilizer data, allowing adaptation without cloning the old unit. After installation:
The entire process takes just a few minutes and ensures full integration with the vehicle’s immobilizer and electronics.
Q: Does ECU A6421502877 / 0281013977 fit my car?
A: Yes, if you have a Mercedes 3.0 CDI OM642 engine in E, ML, GL, S, CLS or R models from 2006–2013, this ECU is compatible. Always compare part numbers with your original unit.
Q: Do I need to clone the old ECU?
A: No. The Virgin version requires no cloning – just adaptation using the PIN code and OEM diagnostic tools.
Q: How long does adaptation take?
A: The adaptation procedure with Mercedes Star Diagnosis usually takes only a few minutes, after which the car can start normally.
Q: Is this ECU Plug & Play?
A: It requires Virgin adaptation. Once the procedure is complete, the ECU becomes fully compatible with your vehicle.
Q: What are the alternative part numbers?
A: The most common numbers are A6421502877 and 0281013977. If either appears on your old ECU, this part will fit.
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