Mercedes SIM271DE20 ECM Cloning Programming Service

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

How Our ECM Cloning Service Works

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

We successfully transfer the following critical data:

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

Once you receive the cloned donor unit back from us, it acts exactly like your original computer. There is no need for expensive additional dealership programming, key relearning, or SCN coding—it is entirely Plug-and-Play!

Supported Mercedes-Benz Vehicles

This w204 ecu clone service covers the Continental SIM271DE20 computers typically found on the 1.8L turbocharged M271 EVO engines from 2012 to 2015. Supported models include:

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

Supported Part Numbers

Common OEM and hardware part numbers include:
SIM271DE20, 5WK91301, A2711500391 (A 271 150 03 91).

Important Shipping Instructions & Terms

To perform this 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). 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.