Rear fog lamp
When visibility is reduced by fog the rear fog lamp can be used so that other road users shall notice vehicles in front at an early stage.
The rear fog lamp can only be switched on when key position II is active or the engine is running and the headlamp control's knob is in position 
or 
.
Press the button for On/Off. The rear fog lamp indicator symbol 
in the combined instrument panel and the lamp in the button illuminate when the rear fog lamp is switched on.
The rear fog lamp is switched off automatically when the engine is switched off or when the headlamp control's knob is turned to position 
or 
.
Note
Regulations on the use of rear fog lamps vary from country to country.