BMW M4 Competition Convertible Finished In Yas Marina Blue With 73,450 Miles, Optional Specification Includes: M Double Clutch Transmission with Drivelogic £2,645 Head-up display £825 Loudspeaker system - harman/kardon £675 Carbon-fibre £395 Air Collar £360 Reversing Assist camera £330 Wind deflector £265 Steering wheel heating £155 Carbon-fibre interior trim, Extended Merino leather Black, Yas Marina Blue Metallic,