This is a used Mercedes-Benz engine control unit / ECU module with Bosch labeling and part number A 274 900 16 00, for the M274 2.0 4-cylinder engine family. It is not left or right side specific; it is an engine-bay control module as shown. The metal case has scuffs, scratches and general used wear, with handwriting and an old worn label area, but the main ID label is still readable. Photo includes the ECU only; no wiring, brackets, screws or programming tool is included. Fitment should be confirmed by VIN or by matching the full part number A2749001600 and Bosch number 0 261 S09 815. Buyer should check connector type, production date, and whether the ECU needs coding, SCN coding, immobilizer matching before installation.
