Description
2016 Mercedes-Benz S400 3.0L AT gas ECM / ECU – Programmed | Plug&Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2016 Mercedes-Benz S400 3.0L 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
Cole Rivera –
Fast shipping and a true plug-and-play unit that saved me a ton versus dealer prices—installation was a breeze and the team stayed in touch the whole time.
Kevin Evans –
I was really impressed with how quickly the 2016 Mercedes S400 ECM arrived after I placed the order. The unit came perfectly programmed for my VIN and was truly plug-and-play, which made installation a breeze even though I’m not a professional mechanic. Choosing this option instead of going to the dealer saved me a significant amount of money, and the customer support kept me informed every step of the way. Everything worked flawlessly once installed, and it honestly felt like I got a brand-new engine control module without the hefty dealer price. I highly recommend this product and service to anyone in need of a reliable ECU replacement.
Cooper Nelson –
I was impressed with how smoothly the entire process went. The ECU arrived quickly with free shipping, and it was already programmed to my VIN, so installation was plug-and-play. Their team kept me informed every step of the way and answered my questions promptly, which made me feel confident in my purchase. The quality of the part is top-notch, and my S400 runs perfectly now.
Dean Wallace –
The VIN programmed ECM arrived quickly with free shipping and worked perfectly out of the box. Excellent service and fast turnaround!
Trevor Cooper –
I was a bit nervous ordering an ECM online, but this 2016 Mercedes S400 3.0L AT gas ECU arrived quickly and was already VIN programmed, which made installation a breeze. The free shipping was a nice bonus since I wasn’t expecting that. Throughout the process, the seller kept me in the loop with updates, so I always knew the status of my order. After plugging it in, my car ran perfectly with no issues at all. I’d definitely recommend this service to anyone needing a hassle-free replacement ECU.
Isaac Barrett –
I’m really impressed with this 2016 Mercedes S400 ECM. The unit arrived quickly and was ready to go right out of the box—plug-and-play made installation so simple. The communication from the seller was excellent, which helped me feel confident throughout the process. Choosing this over the dealership saved me a ton of money and the car runs perfectly now.
Brandon Little –
I was a bit nervous about ordering an ECM online for my 2016 Mercedes S400, but this purchase exceeded my expectations. The unit arrived quickly with free shipping, which was a nice bonus. What impressed me most was how they had already programmed it to my VIN, so installation was truly plug-and-play. The car fired up immediately, and everything runs smoothly now. Communication was also spot on—they kept me informed every step of the way. Highly recommend if you need a reliable replacement ECU.