Description
2012 Mercedes-Benz S350 3.5L AT diesel ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Mercedes-Benz S350 3.5L AT diesel 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
Elijah Bell –
I was really impressed with how quickly the ECM arrived after ordering. The unit was perfectly programmed to my VIN and installed without any issues—it was truly plug-and-play. Choosing this service saved me a huge amount compared to dealer prices, and their communication throughout the process was clear and professional. Overall, a smooth experience from start to finish.
Frank Miles –
The ECU arrived quickly with free shipping and was already VIN programmed—installation was a breeze. Their communication was spot on and answered all my questions promptly.
Trevor Phillips –
I was really impressed with how quickly this ECM arrived—I got it within a few days, which made the whole repair process so much easier. Installing the unit was straightforward since it was truly plug-and-play, just as described. The VIN programming was spot on, and it saved me a ton compared to what the dealership quoted for a similar repair. Communication with the seller was clear and professional, answering all my questions promptly. Overall, this service and product exceeded my expectations and got my Mercedes running smoothly again.
Jason Graham –
Fast shipping and plug-and-play installation made this 2012 Mercedes S350 ECU swap a breeze. Saved me a ton compared to dealer prices and the customer service was on point.