Description
2012 Mercedes-Benz S350 3.0L AT diesel ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Mercedes-Benz S350 3.0L AT diesel models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with our cloning service.
Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
Every ECU is inspected, refreshed, and verified through advanced diagnostic tools. Testing includes:
Complete communication & CAN-bus verification
Sensor input/output and signal integrity checks
Injector & ignition pulse simulation
Power, ground, and load-circuit analysis
Flash memory integrity and checksum validation
Thermal and voltage-stress testing to confirm reliability
Important Note
Some vehicles with IMMO or PATS require key programming after installation. This is normal.
For a 100% plug-and-play solution, we recommend using our full cloning service. We transfer all security data to the replacement unit.
A prepaid shipping label will be emailed to you. Allow you to mail in your original computer to us for full cloning.
If cloning is not selected, the ECU will be VIN programmed, and a key relearn will be required after installation.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Caleb Scott –
The ECU arrived quickly with free shipping and was exactly as described, making installation a breeze. Communication was spot-on, and they answered all my questions promptly.
Adam Graham –
I ordered the 2012 Mercedes S350 3.0L AT diesel ECM, and it arrived quickly with free shipping, which was a nice bonus. The unit was already VIN programmed, so installation was straightforward and completely plug-and-play. I also appreciated how the team kept me informed throughout the process, answering my questions promptly and professionally. Overall, a smooth experience and great quality product.