The C 300 Cabrio is probably the most luxurious compact luxury convertible two-plus-two you can buy, with the only potential drawback being the four-cylinder engine. For me, it makes plenty of useful horsepower, but if 255 horsepower doesn't thrill you, you can always consider the AMG C-Class drop-tops, which have a beefier V6 and V8 under their hoods, depending on which AMG model you buy.
I'm not sure that I see the point of louder, huskier convertibles than this, although I'll admit that all convertibles are good convertibles, at some level. The C 300 is a step beyond a roadster, but it doesn't entirely renounce a roadster's lighthearted nature simply by adding two more seats.
And of course, many times when you choose a drop-top with a big motor, you end up wishing you'd selected the coupé. Cabrios compel one to drive slowly enough to feel the breeze, and if your cabrio doesn't like it slow, you might be tempted to stomp the accelerator and create an airflow that's more like a gale.
I really put the C 300 Cabrio through its paces, making several runs up and back to New Jersey lake country, involving both highways and winding back roads. I also used it for everyday grocery store runs and school drop-offs. For the last, it's not the ideal vehicle — no two-seater is — but it's definitely a kick on sunny days.
The C 300 really shines on the transition from highway to byway. The car is comfy at freeway velocities, and if you like, a $1,700 Driver Assistance Package provides Mercedes suite of semi-self-driving features, including Active Steering Assist. That technology has been, in my experience, the closest that another automaker has come to emulating Tesla's Autopilot autosteer feature, although it falls short of Cadillac SuperCruise's fully hands-free highway tech.
In truth, I used all the Driver Assist stuff sparingly because the C 300 was so much fun to drive myself. A combination of the Mercedes Airscarf neck-heating system and a rear wind deflector means that top-down, high-speed motoring is possible (seat heaters also help). But the soft-top has acoustic dampening, so if you choose to go top up for highway driving, you'll enjoy a quiet cabin.
Exit the freeway and head for winding routes, and you'll discover the soft-top can stow at up to 30 mph. I did this a couple of times and then took to some twisty asphalt.
The C 300 likes to tool along at a nice, controlled pace, sliding in and out of corners — but the turbo four also serves up pop on command. In manual and Sport or Sport Plus mode, the power delivery is smooth and lag-less, and you can choose to finesse curves or overpower them. I'm less and less a fan of paddle shifters, so I usually stayed in automatic and let the graceful nine-speed automatic transmission manage the gears.
The steering could have been crisper, even though it was upgraded as part of the $1,500 AMG Line Package. The ventilated front brakes, with some beefy calipers, made up for it. And while some reviewers have called the C 300's suspension stiff, I found it to be just right. In Comfort or Eco mode it softened, and in Sport and Sport Plus it got firm. The calibrations were perfect. The all-wheel-drive setup wasn't much in evidence, as I drove in perfect conditions except for one day when it rained, and then I limited myself to tooling around town.
The C 300 drop-top can be had for about $50,000, minus a lot of cool, but perhaps not entirely necessary, features. The base, rear-wheel drive car is a machine that I would seriously consider adding to my personal fleet — a sort of grown-up convertible, an expense that could be justified. The extras on my tester car were, to be sure, splendid. But I could have lived without many of them.
The bottom line is that while the C 300 Cabrio ain't cheap, it's one of those cars you're going to look forward to driving, and not just on days when the open-air beckons.