The BMW 4 SERIES CONVERTIBLE (2017-20) 435D XDRIVE 2DR CONVERTIBLE 3.0 DPF SS 313 EU6 M SPORT AUTO8 is a premium four-seat drop-top, combining executive-car comfort with open-air motoring. In the UK it sits above everyday convertibles, offering a more powerful, upscale alternative to mainstream soft-tops and a sporty choice alongside the Audi A5 Cabriolet and Mercedes-Benz C-Class Cabriolet. Mycarcheck.com recorded 794 checks across 340 different VINs, a useful snapshot of interest in this relatively specialist model. Checks show an average private-sale valuation of £22,300 and average recorded mileage of 47,000; typical annual mileage is 9,000, with around 1.7 previous keepers. These are guide figures, not a valuation or guarantee for any individual car. Its diesel performance, all-wheel drive and automatic gearbox make it a confident all-weather cruiser, while the folding roof adds weekend appeal. It best suits couples or households seeking comfort, pace and distinction, rather than maximum practicality.