Doug's Take The E46 BMW M3 is an enthusiast favorite, touting a potent S54 6-cylinder engine, engaging driving dynamics, and timeless styling. This particular M3 is a desirable convertible model with a 6-speed manual transmission, and it comes with some great equipment, too – including the Cold Weather Package, Nappa leather upholstery, and a Harman/Kardon sound system. Plus, this M3 boasts only light modifications and a clean, accident-free Carfax report, to provide additional peace of mind to the buyer.