Check engine light on, hard starting, or engine management issues on your C300? Before assuming the ECU is at fault: on Mercedes-Benz vehicles of this era, the engine ECU is typically paired to the vehicle's immobilizer (EIS/EZS) system, and a used ECU from a different vehicle usually cannot simply be swapped in and expected to run — it generally requires component-protection matching or programming by a dealer or specialist with the right diagnostic equipment. Confirm you have a plan for that step before ordering.

This is the genuine OEM engine control unit (ECU) module for the 2008–2011 Mercedes-Benz C300, manufactured in Germany.

Product Highlights

• Genuine Mercedes-Benz OEM ECU module
• Bullet, pin, and blade terminal connections
• Manufactured in Germany
• In excellent working condition, pulled from a running vehicle
• Exact item pictured will be shipped

Vehicle Fitment

2008–2011 Mercedes-Benz C300

Note on fitment: our records don't confirm an exact engine/trim match beyond "C300" — Mercedes used different ECU part numbers across engine and trim variants even within the same model years. Compare your original ECU's part number against this unit before ordering. Does NOT fit C-Class model years outside 2008–2011, or other C-Class engine variants (e.g. C350) without confirming your part number matches.

What Is Included

ECU module only, as pictured. Only the components visible in the photos are included.

Condition

Pre-owned genuine OEM unit in excellent working condition. May show normal cosmetic wear from age. Check the photos closely for: connector pins and terminal condition, and case condition (cracks or corrosion). You will receive the exact module shown, not a stock photo or substitute unit.

Verify Fitment Before Ordering

Compare against your original before ordering: part number matches your original unit's label exactly, and connector shape and pin layout match. For additional fitment support, send us your VIN and a clear photo of your original ECU's part number before ordering.

Why Choose a Genuine OEM Mercedes-Benz ECU?

• Correct factory engine calibration for your exact configuration
• Original connector — no rewiring needed
• More reliable than an unknown-history aftermarket or remanufactured unit

This is a single unit currently in stock — once sold, we may not have another matching unit.

Installation

Professional installation by a shop with Mercedes-Benz-compatible diagnostic equipment is strongly recommended — as noted above, this ECU will likely need component-protection matching to your vehicle's immobilizer system before it will run, which is not a simple plug-and-play swap. A check engine light or no-start condition isn't always the ECU itself — a failed sensor, wiring fault, or fuel system issue can produce similar symptoms. Confirm the ECU is genuinely the cause via diagnostic scan before ordering.

Order With Confidence

Purchase from Right Choice Auto Parts for accurately represented OEM automotive parts and responsive fitment support. Only one of this exact ECU is currently in stock.