The automatic transmission control unit (often designated as TCU or TCM) is a crucial electronic component responsible for smooth and trouble-free gear shifting. Its failure, most often caused by overheating, short circuits, or water damage, results in jerking, an inability to shift gears, or the vehicle entering limp mode. Purchasing a new module at an authorized dealership is a massive expense, which is why replacing it with a fully functional, used original is the most reasonable solution.
Engine control unit Mercedes A6461509478 0281014227
Vendors's code:
Product code: C0EE-37843
Barcode:
Code 39:
ISBN:
€487.80
Price
€487.80
€600.00
Price
€600.00
In stock
Select a product option:
Individual variants may differ in price
product option
Important: Depending on the ECU type and vehicle model, not all of the options listed below may be available.
To select the correct option for your vehicle and ECU, please contact us before purchasing:
contact@auto24parts.com
1. Locked
This option is intended for professional workshops with the required specialist equipment and technical knowledge.
The ECU has been removed from a vehicle intended for recycling and still contains the immobilizer data and other information from the previous vehicle. Before it can be used in another car, it must be unlocked and then programmed using specialist automotive diagnostic equipment.
2. Unlocked
Several preparation methods may be available. The possible options depend on the ECU type, vehicle model and immobilizer system. Please contact us before purchasing, as some preparation methods are not available for every ECU.
Our electronics specialists can prepare the ECU in one of the following ways:
a) ECU with PIN code (Car Pass)
The PIN code is supplied, but programming with a suitable diagnostic tool is still required. After installing the ECU, it must be reset using the supplied PIN code and then programmed to the vehicle’s immobilizer system.
b) VIRGIN ECU
The data from the previous vehicle is removed and the ECU is restored to a clean, factory-like state. After installation, it must be programmed to the vehicle using a compatible specialist diagnostic tool. Unless another preparation method is specified in the product description, this is the standard unlocking option for most of our ECUs.
c) Plug & Play – IMMO OFF
The immobilizer function is disabled in the ECU. After installation, the engine can start without additional immobilizer programming. Please note that the vehicle will no longer have an active immobilizer function, and an immobilizer warning light or fault code may remain, depending on the vehicle model.
d) Plug & Play – Automatic Programming
After installation, the ECU automatically learns and saves the required vehicle data. No additional programming is normally required.
e) Plug & Play – 1:1 Clone
The data from your original ECU is copied to another fully functional ECU. The cloned unit is then ready for installation without additional programming.
You must send us your original ECU so that we can transfer its data to the replacement unit.
The original ECU must have working communication with the vehicle, a diagnostic tool or our programming equipment. If the required data cannot be read, a complete 1:1 clone may not be possible.
3. Complete Plug & Play Set
A complete matched set containing the ECU, immobilizer components and all other parts required to start the vehicle without additional programming. All components supplied in the set must be installed in the vehicle.
Important:
Dispatch time depends on the selected option. If an unlocked or specially prepared version is ordered, the preparation service usually requires an additional 1–2 business days.
Ask about the product
Engine control unit Mercedes A6461509478 0281014227
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Shipping
from
€30.00
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shipping
(Poland)
from
€30.00
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shipping
(Poland)
Price 30 euros applies shipments to 5 kg on worldwide. Above this weight, please contact us by email to check price
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The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
Will engine control unit A6461509478 fit your Mercedes?
Engine control unit A6461509478, used and inspected. Compare the numbers with the original in your car.
What does number A6461509478 mean on Mercedes engine control units?
This is a used original engine control unit for Mercedes. It manages engine operation based on signals from sensors. The main number is A6461509478, and the other numbers from the listing are given below. The listing does not state the car model or year, so we do not give them in the description and match the part by its numbers. The listing also gives the markings CR3.31. They help tell the control unit versions apart, but the full part number is what decides compatibility.
Part numbers for A6461509478
The numbers as written in the listing and as a single string, the way catalogues list them:
- A6461509478, car manufacturer's original number,
- 0281014227, control unit manufacturer's number.
Check the numbers on your control unit and compare them with those above. If any of them differs, contact us before ordering.
Symptoms of a faulty engine control unit
- control unit communication or power supply errors appear in the fault memory,
- the engine jerks when accelerating,
- the housing or connector of the control unit shows signs of water ingress or corrosion,
- the engine no longer runs properly after the battery has gone flat.
Similar symptoms also occur with faulty sensors, bad fuel or worn spark or glow plugs, so start with diagnostics and only then replace the electronics.
Questions and answers
| Where do I find number A6461509478 on my control unit? |
|---|
| The numbers are on a sticker or printed on the housing of the control unit. Take a close-up photo of the label in good light so that all the characters can be read. |
| Which car model does this control unit fit? |
| The listing does not state a model or year, so confirm compatibility with the number from the original control unit in your car, or send us a photo of its label. |
| What do the markings CR3.31 in the listing mean? |
| They are markings of the version or type of the control unit. They help tell the units apart, but the full part number is what decides compatibility. |
| What is the condition of this control unit? |
| It is an original recycled part in good condition, checked by us. Warranty details are in the product features table. |
Not sure about the match? Send us a photo of the label on your control unit and we will check whether this part will fit.
