This 2018 Mercedes-Benz C-Class C300d AMG Line Premium convertible is a great all-rounder quick enough to be genuinely fun to drive, but still practical for daily life. The 2.0 litre diesel is Euro 6 compliant and gets you from 0-62mph in just 6.3 seconds, with plenty of mid-range punch for overtaking and motorway driving. Inside, it's well equipped. You get Apple CarPlay and Android Auto, wireless phone charging, a digital virtual cockpit, and a widescreen infotainment display, so everything's easy to see and control on the move. Parking is no hassle either, thanks to a reversing camera and Active Parking Assist with front, rear, and side PARKTRONIC sensors. For comfort, there's heated front seats, two-zone THERMATIC climate control, and the clever AIRSCARF system to keep your neck warm with the top down. There's also the AIRCAP wind deflector, which raises a mesh screen behind the rear seats along with a deflector over the top of the windscreen, cutting down on buffeting and wind noise with the roof lowered. LED headlights with High Beam Assist take the effort out of night driving, automatically dipping for oncoming traffic. It's also a practical car day-to-day, with a decent-sized boot for luggage or the weekly shop. All in, a well-specced C300d Cabriolet that doesn't compromise on performance, comfort, or usability.