Description
2008 Mercedes-Benz S550 5.5L AT gas ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2008 Mercedes-Benz S550 5.5L 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: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Keith Gonzalez –
The ECU arrived quickly with free shipping and was perfectly programmed for my S550—smooth plug-and-play installation.
Really impressed with their quick responses and professional programming service; the ECM works flawlessly in my Mercedes.
Fast turnaround and the ECU was already VIN programmed, making installation hassle-free—great quality at a fair price.
Shipping was super reasonable, and their team answered all my questions promptly, making the whole process easy.
Received the updated ECM well-packaged and ready to install; excellent communication throughout the entire purchase.
Austin Phillips –
I purchased the 2008 Mercedes S550 5.5L ECM from this seller, and it arrived quickly with free shipping, which was a nice bonus. The unit was VIN programmed perfectly, and the plug-and-play setup made installation straightforward. They also kept me informed throughout the process, answering my questions promptly. Overall, the quality and service exceeded my expectations.
Max Richardson –
I purchased the 2008 Mercedes S550 ECM and was really impressed with how quickly it arrived. The unit was completely plug-and-play, which made installation straightforward and hassle-free. This saved me a ton compared to dealer prices, and the communication from the seller was clear and professional throughout the process. Overall, a smooth experience from start to finish.
Lucas Keller –
Fast shipping and the plug-and-play unit worked perfectly—saved me a bundle compared to dealer prices. Installation was a breeze and the support was top-notch.
Tyler Miles –
I was really impressed with how quickly this ECM arrived after I placed my order. The plug-and-play setup was exactly what I needed, making the installation process straightforward and stress-free. Compared to the dealer, this service saved me a significant amount of money, which was a huge relief. The communication from the seller was clear and helpful whenever I had questions. Overall, it was a smooth experience from start to finish, and my S550 is running perfectly again. I would definitely recommend this to anyone looking for a reliable replacement unit.
Brandon Keller –
I was a bit nervous ordering an ECM online, but this 2008 Mercedes S550 unit arrived sooner than expected with free shipping, which was a nice surprise. The best part was how professional the programming service was—they handled the VIN matching perfectly, so installation was literally plug-and-play. Throughout the process, the seller kept me updated on every step, which made me feel confident in my purchase. Since swapping it out, my car runs smoothly again without any hiccups. Definitely recommend if you want a hassle-free experience.
Brandon Hill –
I was a bit nervous about ordering a replacement ECU for my 2008 Mercedes S550, but this unit arrived exactly as described and was already VIN programmed, which made the install much easier than I expected. The shipping was very reasonable considering the size and value of the part, and it didn’t take long to get to my door. After installation, my car started up without any issues and has been running smoothly ever since. The whole process was straightforward, and I appreciated how the team kept me informed every step of the way. Definitely recommend if you want a hassle-free solution with quality parts.