See also:

Switch off the engine during longer stops
Switch off the engine during longer stops, e.g., at traffic lights, railroad crossings or in traffic congestion. Fuel savings are achieved after the vehicle is switched off for only approx. 4 s ...

Increasing or decreasing vehicle speed
You can specify your desired speed in the range from approx. 4 mph/6 km/h to approx. 15 mph/ 25 km/h using the rocker switch of the cruise control on the steering wheel. You can change the veh ...

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...