Here’s a professional eBay-ready listing for your ECU:

Title:
2014–2018 Mercedes W205 C-Class Engine Control Module ECM ECU A6519005203 OEM

Description:
Genuine OEM Mercedes-Benz Engine Control Module (ECM / ECU) removed from a W205 C-Class (2014–2018) equipped with the OM651 diesel engine. The unit has been tested and is in good working condition.

This module controls essential engine functions including fuel injection, turbo boost regulation, emissions control, and overall engine performance.

Part Number:
A651 900 52 03

Fitment:

• Mercedes-Benz C-Class W205 (2014–2018)

• Vehicles equipped with OM651 diesel engine
  (Please confirm compatibility using the part number before purchase.)

Condition:

• Original OEM Mercedes-Benz part

• Fully tested and functional

• Good used condition

• Normal signs of wear

Package Includes:
1 × Engine Control Module (ECM / ECU)

Important:
Please ensure the part number A6519005203 matches your original unit before purchasing.
Programming, coding, or immobilizer adaptation will be required after installation.

• Returns:

  14-day return policy. Please contact us before sending anything back.

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  If any issue comes up, please contact us first — we will resolve it quickly and professionally.

  🌍 Customs & Import Charges

  Customs duties, import taxes, and other fees are not included in the price or shipping cost. These are the buyer’s responsibility.