The BMW 3 SERIES CONVERTIBLE (2007-14) 330D 231 2DR CONVERTIBLE 3.0 231 SE STEP AUTO is a four-seat, two-door premium convertible, combining open-air motoring with the comfort and refinement expected of a BMW. In the UK used-car market, it sits above ordinary family cars as a desirable, more powerful alternative to mainstream drop-tops. mycarcheck.com has recorded 231 look-ups covering 78 distinct VINs, giving a useful snapshot of interest. Checks show an average private-sale valuation of £4,200, average recorded mileage of 109,000 miles and annual use of 5,000 miles; cars had about three to four previous keepers on average. These figures describe checked examples, not guarantees. Its diesel power and automatic gearbox suit relaxed longer journeys and weekend drives, while the folding roof adds occasion. Less practical than a saloon and potentially costlier to run than smaller convertibles, it stands out among rivals for combining open-air comfort, performance and premium feel overall.