Around three-quarters of the vehicle’s parts, including the chassis, engine, suspension, power train and aerodynamics, were checked and optimised to make them simpler, lighter and more stable. In the interior of the 2015 Polo R WRC, the gearstick has been replaced by a new gearshift paddle. The lever for the hydraulically operated handbrake is located conveniently in relation to the steering wheel. The on-board electronics and cut-outs are located in the centre console. A rally computer in front of the co-driver’s seat logs important information, such as the route travelled and the time until the next time control.