2011 Mercedes C-Class Owner's Manual - Page 162

160 Driving systems Minimum distance Center Corners Approx. 8 in (20 cm) Approx. 6 in (15 cm) Driving and parking If there is an obstacle within this range, all warning displays light up and a warning tone sounds. If the distance falls below the minimum, the distance may no longer be shown. Side view Warning displays The warning displays show the distance between the sensors and the obstacle. The warning display for the front area is located on the dashboard above the center air vents. The warning display for the rear area is located on the headliner in the rear compartment. Top view Front sensors Center Corners Rear sensors Center Corners Approx. 48 in (120 cm) Approx. 32 in (80 cm) Warning display for the front area : Segments on the left-hand side of the Approx. 40 in (100 cm) Approx. 24 in (60 cm) vehicle ; Segments on the right-hand side of the ! When parking, pay particular attention to objects above or below the sensors, such as flower pots or trailer drawbars. PARKTRONIC does not detect such objects when they are in the immediate vicinity of the vehicle. You could damage the vehicle or the objects. Ultrasonic sources such as an automatic car wash, a truck's compressed-air brakes or a pneumatic drill could cause PARKTRONIC to malfunction. vehicle = Segments showing operational readiness The warning display for each side of the vehicle is divided into five yellow and two red segments. PARKTRONIC is operational if yellow segments showing operational readiness = light up. The gear lever position or the transmission position of the automatic transmission determines which warning display is active when the engine is running.