Engine control module from a 2009 Mercedes-Benz C300. This was carefully removed from a vehicle that ran well with no misfires and no check engine light on. The case, connectors and mounting points have no broken parts. The images are of the actual item you will receive. This ECM has been unlocked. This will still need to be programmed to your vehicle during installation. But since this ECM is unlocked, the programming process is no different than installing a new ECM. This makes finding a repair facility to program this part much easier as it eliminates the hardest part of the pre-owned ECM installation process. Fits 2009 Mercedes-Benz C300 with part number 272 153 73 91 ONLY.