Description
2012 Mercedes-Benz C-Class 3.5L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Mercedes-Benz C-Class 3.5L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with our cloning service.
Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
Every ECU is inspected, refreshed, and verified through advanced diagnostic tools. Testing includes:
Complete communication & CAN-bus verification
Sensor input/output and signal integrity checks
Injector & ignition pulse simulation
Power, ground, and load-circuit analysis
Flash memory integrity and checksum validation
Thermal and voltage-stress testing to confirm reliability
Important Note
Some vehicles with IMMO or PATS may require key programming after installation. This is normal.
For a 100% plug-and-play solution with no relearns, your original ECU must be sent in for cloning. We transfer all security data to the replacement unit.
👉Add the cloning service as a bundle at checkout — $200 CAD / $140 USD
A prepaid shipping label will be emailed to you.
If cloning is not selected, the ECU will be VIN programmed, and a key relearn will be required after installation.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Jacob Brown –
I recently replaced the ECM on my 2012 Mercedes-Benz C-Class with this VIN programmed unit, and I couldn’t be happier with the results. From the moment it arrived, I was impressed by how straightforward the installation was—just plug it in and it fired right up without any hiccups. The engine runs smoothly now, and all the previous issues disappeared instantly. Shipping was quick, and I appreciated the helpful customer support available when I had a couple of questions before ordering. Overall, a seamless experience that saved me time and hassle.
Caleb Gonzalez –
This ECM was exactly as described and fit my C-Class perfectly—installation was a breeze, and my car runs like new again! Highly recommend for anyone needing a quick, reliable fix.
Adam Cooper –
The ECM arrived quickly and was exactly as described—a perfect fit for my 2012 Mercedes C-Class 3.5L. Installation was straightforward, and the VIN programming saved me so much hassle. The car fired right up without any errors, and it’s been running smoothly ever since. Really impressed with the quality and support throughout the process.
Logan Carter –
I was a bit nervous about ordering an ECM/ECU online, but this one for my 2012 Mercedes C-Class arrived quickly and was ready to go right out of the box. The VIN programming meant I didn’t have to worry about compatibility issues, and installation was surprisingly straightforward. My car started up immediately without any hiccups, and the performance feels just as smooth as before. It’s clear they put care into matching the unit perfectly. Overall, a great experience that saved me both time and a trip to the dealer.