The Mercedes-Benz C-class W204 is a beautiful piece of engineering, but one can advance sufficiently in age that turning the very tight gas cap becomes challenging. This lever is designed to fit around the narrowest part of the gas cap protrusion, with a lever arm for turning. After securing the lever to the protrusion of the gas cap, a quick turn of the lever will release the gas cap. Be careful as careless use could result in paint scratching.
Because this piece lives inside the car in the hot summer, I printed this with PETG.
The author marked this model as their own original creation.