Mercedes SIM271DE20 ECM Cloning & Programming Service (W204 / R172)

Expert Mercedes SIM271DE20 ECM Cloning Service

If the engine computer on your Mercedes-Benz has failed due to water damage, electrical shorts, or internal hardware faults, you cannot simply buy a used ECM from a junkyard and swap it out. The Continental SIM271DE20 Engine Control Module is strictly locked to your vehicle’s Drive Authorization System (FBS3 / Immobilizer). Bypassing the astronomical costs of buying a brand-new computer from the dealership requires specialized data transfer. Our professional sim271de20 cloning service provides a reliable, affordable, and permanent solution.

How Our ECM Cloning Service Works

With our expert mercedes ecm programming service, our electrical engineers perform a true 1:1 sector-by-sector copy of your original broken computer’s accessible data and precisely mirror it onto a healthy used donor unit. We ensure all necessary security, calibration, and operational data is properly transferred so the new computer instantly recognizes your car and your original keys.

During the w204 ecu clone process, we successfully transfer the following critical vehicle data:

• Vehicle Identification Number (VIN)
• Immobilizer Security Data (FBS3 Authorization)
• Software and SCN Coding Configurations
• Odometer Mileage and Engine Operating Hours

Once you receive the cloned donor unit back from our facility, it acts exactly like your original computer. There is absolutely no need for expensive additional dealership programming, key relearning, or SCN coding—it is entirely Plug-and-Play! Simply bolt it into the engine bay and start the car.

Supported Mercedes-Benz Vehicles (2012-2015)

This repair covers the Continental SIM271DE20 engine computers typically found on the M271 engines from 2012 to 2015. Supported models include:

• Mercedes C-Class (W204): C230, C280, C300, C350
• Mercedes SLK-Class (R172): SLK280, SLK300, SLK350

Supported OEM Part Numbers

We service computers matching the following hardware and part numbers (including but not limited to):

SIM271DE20 | 5WK91301 | A2711500391 (A 271 150 03 91)

Important Shipping Instructions & Terms

To successfully perform this mercedes module cloning service, you must carefully package and mail us BOTH your original malfunctioned computer AND your replacement donor computer. Please ensure the donor unit is an exact hardware match (SIM271DE20) before shipping.

Ready to get your Mercedes back on the road? Contact us today for more details on your repair. For secure mail-in shipping across the country, we highly recommend using USPS or FedEx.

Please note: After installing the cloned module back into your Mercedes, you may need a standard OBD2 scanner to clear any residual historical fault codes before starting the engine for the first time. If the processor on your original computer is severely damaged (e.g., burned PCB, crushed) and we cannot communicate with it to extract the data, it cannot be cloned. Unclonable computers will be returned with a refund, minus a diagnostic fee and return shipping costs.