The BMW 4 Series Convertible is a premium open-top car, sitting above family convertibles and alongside rivals such as the Audi A5 Cabriolet and Mercedes-Benz C-Class Cabriolet. This 425d Sport Professional Media pairs stylish BMW design with a diesel engine, offering a more practical long-distance choice than some petrol-powered alternatives. It suits drivers wanting open-air enjoyment without giving up a commuter or touring car. Strong diesel performance and a fuel-saving focus can make longer journeys appealing, while the folding roof creates an experience unlike a conventional saloon. Its two-door layout is less convenient for rear-seat passengers or everyday family duties. mycarcheck.com has recorded just two look-ups, covering one distinct VIN, so these figures are a small snapshot rather than a reliable market-wide guide. Within that sample, average private-sale valuation was £9,000, mileage 90,000, annual mileage 3,000 and previous keepers four. Check each car’s history, condition and service records before buying.