outside temperature. It may be helpful to ventilate the vehicle before 
driving and then to drive a short distance with the windows open. Af-
ter that, switch on the air conditioner with the windows closed. Keep 
the windows closed when driving at high speeds. Open windows in-
crease fuel consumption. 
  Switch off seat heating once it has served its purpose. 
  Switch off the rear window defroster as soon as the windows are 
free of fog and ice. 
Additional factors that increase fuel consumption (examples): 
  Malfunctioning engine control. 
  Driving in the mountains. 
  Towing a trailer. 
  NOTICE 
Never let the vehicle coast or roll down a hill in Neutral (N), es-
pecially when the engine is not running. The transmission will 
not be lubricated and will be damaged. 
Fuel-efficient driving 
 
Fig. 147 Fuel consumption in mpg at 2 different outside air tempera-
tures.  
 
Orientation lines overview 
Meaning of the orientation lines projected on the screen ⇒ fig. 154. All 
distances of the orientation lines refer to a vehicle on a level surface. 
(1) Red: Safety distance. Area up to about 16 inches (40 cm) behind 
the vehicle on the road. 
(2) Green: Vehicle extension (somewhat wider) toward the rear. The 
green area ends about 6 feet (2 meters) behind the vehicle on 
the road. 
(3) Yellow: The extension of the vehicle to the rear showing the ve-
hicle path as determined by the position of the steering wheel. 
The yellow area ends about 10 feet (3 meters) behind the vehicle 
on the road. 
Parking 
  Position the vehicle in front of a parking space and shift into Re-
verse. 
  Slowly back up and steer so that the yellow orientation lines lead 
into the parking space (3). 
  Align the vehicle so that the green and yellow orientation lines are 
parallel with the parking space. 
Parallel parking (Mode 2) 
 
Fig. 155 On screen: Orientation lines and area of the parking space 
behind the vehicle.