Description
2016 Mercedes-Benz CLS550 4.7L AT gas ECM / ECU – Programmed | Plug&Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2016 Mercedes-Benz CLS550 4.7L AT gas models.
Each unit is VIN-programmed, updated, and fully tested.Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
This is not a brand-new unit. It is a rebuilt unit that is inspected, refreshed, and fully tested before shipping.
Testing includes communication, CAN-bus, sensor signal, power circuit, flash memory, and reliability checks.
Important Note
If your vehicle does not have an IMMO or PATS system, this unit will be directly plug&play.
If your vehicle has an IMMO or PATS system, it will require a key relearn after installation. You can visit your local locksmith for help.
We also offer a full cloning service. We transfer all security data to the replacement unit, so it will be a plug&play installation.
For all European cars, Hyundai, and Kia vehicles, we recommend adding our cloning service as a bundle.
For American and Japanese cars, we recommend doing a key relearn on-site.
Contact Us
Email: info@fixecm.com
Phone: 647-247-8555






Jacob Brooks –
I was really impressed with how fast the shipping was for this 2016 Mercedes CLS550 ECM. When it arrived, I was relieved to find that it was truly plug-and-play, making the installation a breeze even though I’m not a professional mechanic. The unit worked perfectly right away, and it saved me a huge amount compared to what the dealer quoted me for a replacement. The team was very responsive and kept me updated throughout the process, which gave me peace of mind. Overall, the entire experience was smooth and hassle-free—I’ll definitely turn to them again if I need ECU parts in the future.
Carlos Allen –
Fast shipping and the ECU was truly plug-and-play—saved me a bundle versus dealer prices. Installation went smoothly thanks to their clear instructions and quick support.
Caleb Nelson –
I’m really impressed with the 2016 Mercedes CLS550 ECM I purchased. The shipping arrived quicker than I expected, and the unit was completely plug-and-play, making installation hassle-free. The communication from the seller was clear and helpful throughout, and this service saved me a ton compared to dealer prices. Overall, a smooth experience from start to finish.
Michael James –
I’m very impressed with the quality of this ECM for my 2016 Mercedes CLS550. It arrived quickly with free shipping, which was a nice bonus. The unit was already VIN programmed, so installation was straightforward and hassle-free. Overall, the entire process was smooth and the car is running perfectly now.
Justin Brown –
Received my programmed ECU quickly with free shipping, and it fit perfectly—couldn’t ask for better service or quality.