Nimble handling for a big coupe, endless power from ultrasmooth V8, elegant interior design.But like other BMWs, the 645Ci immediately establishes itself as the athlete of its segment. A large section of glass covers most of the roof and gives the cockpit an airy feel.While other manufacturers have experimented with various ways of illuminating the cabin, BMW continues to stick with bright orange backlighting for the gauges and controls. Its easy on the eyes and establishes an immediate link between a 2004 645Ci and previous BMWs that customers might have owned and loved. There are no roots to trace when it comes to the layout of the automatic climate control system, but this is the simplest setup the company has ever offered. Able to function independently of the iDrive interface, the system features dual temperature dials for the driver and passenger and a real off button.