The BMW 6 SERIES (2004-07) M6 2DR CONVERTIBLE 5.0 SMG AUTO is a large, luxury four-seat convertible, sitting near the top of the used grand-touring market rather than serving as an everyday family car. Its long bonnet, folding fabric roof and dramatic styling give it real presence, while the powerful V10 engine and SMG transmission promise rapid, exciting performance. Mycarcheck.com records 125 look-ups across 49 different VINs, a useful sample for this specialist model. Checks show an average recorded mileage of 72,000 miles and just 2,000 miles a year, with an average of 6.5 previous keepers. The average private-sale valuation is £14,500, though condition, history and maintenance can make a substantial difference. It’s best for enthusiasts wanting open-air weekend drives, not buyers prioritising economy or family practicality. Compared with Mercedes-Benz CLK AMG rivals, the M6 offers distinctive V10 character and long-distance comfort; check service history and roof operation before buying.