The product is a Mercedes-Benz Engine Control Module (ECM) ignition switch with a clip-on/snap-on mounting style. It is compatible with models from 2008 to 2012 and comes with a matching key remote fob. The ECM has manufacturer part numbers A2075450108, A 272 900 06 00, and A2721531092. This ECU is an essential component for controlling the ignition system in a Mercedes C300 W204 vehicle.