This version of the Mercedes C-Class scored near the top of the compact sport sedan segment. Newcomers to the marque will appreciate the C300's comfort, quiet, agility and overall excellence. Buying used, we'd look for one with a rear camera, blind-spot assist and heated seats. Another desirable feature is the panoramic sunroof. The Multimedia package includes a larger center screen and navigation system, but opting for a car with the Garmin accessory navigation upgrade and the standard screen gives you an easier-to-use interface. It also allows you to skip the Premium package, which gets really pricey for LED headlights and an upgraded audio system. A broad array of the latest driver assistance technology is offered as standard equipment, including collision prevention.