BMW has applied its agonisingly named ‘Life Cycle Impulse’, which everyone else refers to as an ‘update’, to its sexy 4 Series coupe, convertible and Gran Coupe confused sedan. The changes extend to LED headlights and tail-lights, interior styling tweaks and an upgrade of the iDrive system to version 6.0. The seductively named Sunset Orange and Snapper Rocks Blue join the paint palette.