For exterior dimensions, the Audi Q9 measures 5,307 mm long, 2,205 mm wide (including mirrors) and 1,806 mm tall with a 3,141 mm wheelbase to make it the largest Audi of all time, according to the manufacturer. Meanwhile, its brake discs measure 400 mm in front and 350 mm at the rear. Steering is electromechanical with speed-dependent power assistance, and the Q9 also gets rear-wheel steering with up to five degrees of steering angle. Intelligent connected lighting also applies to the headlamps of the Audi Q9, where its digital matrix LED headlamps feature a new micro-LED module. Further measures can also be initiated by the system, including activating the hazard warning lights and delivering seatbelt and brake alerts.