Use coasting conditions
When approaching a red light, take your foot off the accelerator and let the vehicle coast to a halt.
On a downhill gradient, take your foot off the accelerator and let the vehicle roll.
The flow of fuel is interrupted while coasting.
See also:
Charging the battery
In the vehicle, only charge the battery via the
terminals in the engine compartment, with the engine switched off. ...
Windshield washer nozzles
The washer jets are automatically heated*
whenever the ignition is switched on. ...
Remove attached parts following use
Remove unneeded auxiliary mirrors, roof or rear
luggage racks after use.
Attached parts on the vehicle impair the aerodynamics
and increase the fuel consumption. ...