The once prestigious SL is now available in a single model—AMG 63 4Matic+. In the process, it has gone from a comfortable grand touring convertible to a seriously sporty droptop, one that features a turbocharged 4.0-litre V8 producing 577 horsepower. The ride is stiffer than what typical SL drivers are used to, while four-wheel steering improves handling at low and high speeds. Planning a trip? You can always use the tiny rear seats as extra storage.