Opel's successful Corsa supermini was joined by the little Opel Adam in 2012. The Karl is the latest addition to the club and is the automaker's entry-level city car. For less than 10-thousand euros, buyers get a four-door model that's 3.68 meters in length, with room for five. The Karl, which will be marketed as the Vauxhall Viva in the UK, is a true city car. To help the vehicle fit into tiny parking spaces, overhangs have been kept to a minimum. But that doesn't mean Opel has cut corners. The Karl features a new generation 1-liter, 3-cylinder gasoline engine as well as many optional safety features.