For the last 33 years, the Mercedes-Benz C-Class has defined compact luxury and was, until the smaller A-Class arrived, the most affordable car to wear the three-pointed star. It has gone up against many rivals, most notably BMW’s 3 Series, but the fact that buyers continue to flock to this entry-level luxury sedan shows that the brand’s “the best or nothing” approach has continually struck a chord with consumers. It is also an increasingly attractive used proposition, with older generations having depreciated significantly since they were new. Does this, therefore, make the Mercedes C350 a good used buy?