Description
2012 Mercedes-Benz S-Class 4.7L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Mercedes-Benz S-Class 4.7L 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
Mason Moore –
The ECM arrived quickly and was exactly as described. Installation was straightforward since it was already programmed to my VIN, saving me a lot of hassle. After swapping it in, my S-Class started right up with no issues, and everything runs smoothly. I really appreciate the clear communication from the seller and the seamless setup experience.
Adrian Brooks –
I was a bit nervous about swapping out the ECM on my 2012 Mercedes S-Class, but this unit made the whole process surprisingly simple. It arrived quickly, and the fact that it was already VIN programmed saved me a huge headache. Installing it was truly plug-and-play—no extra coding or trips to the dealer required. Once everything was hooked up, my car fired up like new, and the performance feels smoother than ever. I’m really impressed with the quality and the seamless fit. Definitely a solid buy for anyone needing a reliable replacement!
Leo Ramirez –
I was a bit nervous about ordering an ECM/ECU online for my 2012 Mercedes S-Class, but this unit exceeded all my expectations. It arrived quickly, and the VIN programming meant it was fully ready to install right out of the box. The installation went smoothly without any hiccups, saving me a lot of time and hassle. Once fitted, my car fired up immediately and runs perfectly, just like before. It’s clear this is a quality part, and I appreciated the support team’s helpful advice when I had a couple of questions. Highly recommend for anyone needing a reliable replacement!
Connor Parker –
Arrived quickly and worked perfectly right out of the box—exactly what my S-Class needed. Love how hassle-free the installation was!