Description
2012 Mercedes-Benz CLS-Class 5.5L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Mercedes-Benz CLS-Class 5.5L 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
Jason Baker –
I was a bit nervous going into this purchase since I’ve never replaced an ECM before, but this unit arrived perfectly programmed for my 2012 CLS-Class and was truly plug and play. Installation was straightforward, and everything fired up without a hitch on the first try. The shipping was surprisingly fast too, which helped me get my car back on the road quickly. I also appreciated the helpful tech support team who answered a couple of my questions before I ordered. Overall, this was a smooth, hassle-free experience and exactly what my Mercedes needed. Highly recommend to anyone looking for a reliable replacement!
Robert Wilson –
I was a bit nervous about replacing the ECM on my 2012 CLS, but this unit arrived exactly as described and was truly plug-and-play. The VIN was already programmed, so installation was straightforward and saved me a lot of time and hassle. Shipping was surprisingly quick, and I appreciated the clear instructions that came with the package. After swapping it in, my car fired up immediately with no issues, and everything functions flawlessly. Definitely a reliable purchase for anyone needing a direct replacement.
Daniel Young –
Installed the ECU in minutes with zero hassle, and my CLS is running smoother than ever—highly recommend! Shipping was quick and the unit came perfectly programmed to my VIN.
Noah Green –
This ECM arrived quickly and was exactly as described for my 2012 Mercedes-Benz CLS-Class 5.5L. The VIN programming was spot on, making the installation straightforward without any hiccups. I appreciated how seamless the plug-and-play setup was, and the car fired right up with no issues. Overall, a reliable part that restored my vehicle’s performance perfectly.