Amazing New BMW M4 Convertible with BMW M Performance Exhaust Installed by BMW. Sweet Exhaust Sound. Black Sapphire Metallic with Black Extended Merino Leather & Executive Package. M Double Clutch Transmission with Drivelogic. M Adaptive Suspension with 19 inch Black M Wheels style 437M. 0 to 60 in 4.2 seconds! BMW Review. Car Review. Rev Time with Vanessa. Thumbs Up.