Mercedes SIM271DE20 SIM271KE20 ECU Clone Programming Service | M271 C250 SLK250
Mercedes SIM271DE20 SIM271KE20 ECU Clone Programming Service | M271 C250 SLK250
Mercedes SIM271DE20 SIM271KE20 ECU Clone Programming Service | M271 C250 SLK250
This is a mail-in ECU cloning service for supported Mercedes-Benz vehicles equipped with Siemens / Continental SIM271DE20 and SIM271KE20 engine control modules.
We transfer the necessary vehicle-specific data from your original ECU into a compatible replacement ECU that you provide. The replacement retains the required original vehicle and immobilizer information, allowing it to replace the original without normal replacement ECU personalization or immobilizer programming.
This service is commonly used for Mercedes-Benz M271 1.8L turbocharged engine applications equipped with these ECU types.
When to Use This Service:
- Your original SIM271DE20 or SIM271KE20 ECU is faulty but still readable.
- You have a compatible used replacement ECU.
- You need the original vehicle-specific and immobilizer data transferred to the replacement ECU.
- You want to replace the original ECU without normal replacement ECU personalization.
What This Service Does:
- Reads the necessary data from your original ECU.
- Transfers the required vehicle-specific and immobilizer data into the replacement ECU.
- Retains the original vehicle information and ECU configuration.
- Prepares the replacement ECU for installation back into the vehicle.
Supported ECU Types:
- Siemens / Continental SIM271DE20
- Siemens / Continental SIM271KE20
Common U.S. Applications:
- Mercedes-Benz C250 (W204) – 2012–2014
- Mercedes-Benz SLK250 (R172) – 2012–2015
Compatibility is determined primarily by the ECU type, hardware, part number, engine, and vehicle application, not model and year alone.
Important Requirements:
- YOU MUST SEND BOTH ECUs — ORIGINAL AND REPLACEMENT.
- The original ECU must contain readable data for this cloning service.
- The replacement ECU must be compatible with the original.
- We recommend matching the original ECU part number whenever possible.
If you are unsure whether your replacement ECU is compatible, send us clear photos of both ECU labels before purchasing.
Original ECU Severely Damaged?
If your original ECU has severe water damage, physical board damage, or no communication, contact us with your vehicle information, ECU part number, and a description of the damage before purchasing.
Data recovery may still be possible in certain cases depending on the condition of the original ECU.
Why Choose ECU Cloning?
- Transfers the original vehicle-specific and immobilizer information.
- Allows a compatible used ECU to replace the original.
- Avoids normal replacement ECU personalization and immobilizer matching.
- Ideal for replacing a faulty SIM271DE20 or SIM271KE20 ECU.
Don’t See Your Vehicle?
Send us your vehicle information and ECU part number for verification. We’re happy to assist!
Common Part Numbers
Common Part Numbers
A2711500391
A2711502379
A2711532379
A0034468840
A0044467540
A2719036006
2719026100
5WK91301
5WK90709
General FAQ
See All
What is immo off or immobilizer delete, and will it work for my VW or Audi?
Immobilizer delete (immo off) bypasses the immobilizer in the engine control unit (ECU) of VW and Audi vehicles. It’s used when the vehicle starts but immediately shuts down due to a fault in the immobilizer system, often with fault codes P1570 or P0513. Immo off services will not work if the vehicle does not start at all; it must start and then be shut down due to the immobilizer.
What is module cloning, and do part numbers need to match?
Module cloning involves copying all the data from one module to another, allowing the replacement to function just like the original. While it's generally recommended to match part numbers for compatibility, the necessity can vary by module. Some require exact matches, while others are more flexible and allow cloning between different part numbers. Each product listing on our website specifies the part number requirements. If you're unsure, feel free to reach out for guidance.
Do you have to open the module cases?
We only open module cases when absolutely necessary. For services that don’t require opening, we won’t open the module. However, depending on how badly damaged your original ECU is, sometimes opening the module is the only way to retrieve data. Additionally, some services don’t have a plug-in method at all and require direct access to the board, including soldering or chip replacement. The need to open modules is not specific to us but is sometimes essential depending on the condition of the ECU.
What are the shipping procedures and turn around times?
After purchasing, you will receive an email with shipping instructions. You are responsible for shipping your modules to us, and we will cover the return shipping. You can use any shipping service that is convenient for you. We typically use UPS Ground (3-5 days) for return shipping, but in some cases, we may use USPS or FedEx. Once we receive your package (shipping times depend on how quickly you ship it and the service used), we typically ship it back the next business day. Some services may require a 2-day handling time, depending on the complexity.
For detailed shipping times to and from your location, check out our shipping speed map.
What is the warranty?
We offer a 90-day warranty on programming only. This covers the accuracy of the programming performed, but does not extend to the module hardware itself.
Mercedes SIM271DE20 SIM271KE20 ECU Clone Programming Service | M271 C250 SLK250
