The DS 7 Crossback E-TENSE 4x4 represents this luxury French brand's more distinctive take on what a 'D'-segment luxury plug-in SUV should be. It can take you over 30 miles without emitting any CO2, manage 128mpg, sprint to sixty in six and a half seconds and even extricate you from a muddy carpark on your annual trip to Glastonbury. In short, it's a bit special - and is styled that way too.