Description
2008 Mercedes-Benz E550 5.5L AT gas ECM / ECU – Programmed | Plug&Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2008 Mercedes-Benz E550 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: 647-247-8555





Jose Anderson –
I was really impressed with how smoothly the entire process went for the 2008 Mercedes E550 ECM. The team provided a professional VIN programming service, so it was practically plug-and-play once I received the unit. Shipping was surprisingly fast and very affordable, which made the whole experience even better. When I had a couple of questions about installation, their customer support responded promptly and clearly. After installing the ECU, my car runs like new again, no hiccups at all. Highly recommend if you want a hassle-free solution.
Sean Reynolds –
Fast shipping and the plug-and-play ECU worked perfectly on my 2008 E550. Saved me a bundle compared to dealer prices and installation was a breeze.
Hunter Douglas –
I purchased the 2008 Mercedes E550 ECM and was really impressed with the quality and the fact that it came VIN programmed, which made installation much easier. The team provided excellent communication throughout the process, promptly answering all my questions and keeping me informed about shipping. Shipping was also very reasonable, and the part arrived faster than expected. Overall, a smooth experience from start to finish.
Jorge Willis –
The ECU arrived quickly with free shipping and was perfectly programmed for my 2008 E550—installation was a breeze.
Customer service was great; they answered all my questions promptly and the VIN programmed ECU worked flawlessly right out of the box.
Super fast turnaround and the plug-and-play setup saved me so much time. Highly recommend this updated ECM for the 5.5L Mercedes.
Travis Graham –
I’m really impressed with how quickly the 2008 Mercedes E550 ECM arrived—it was shipped fast and arrived exactly as described. Installation was straightforward since the unit was truly plug-and-play, which saved me a lot of time and hassle. Compared to dealership prices, this service was a fantastic deal, and their communication throughout the process was clear and professional. Overall, a smooth experience that got my car back on the road without breaking the bank.