Daytime running lights
The vehicle has sensors that detect ambient lighting conditions. With the lighting ring in the 
position, the daytime running lights will always be activated when the ignition is in mode II or when the engine is running. In weak daylight or dark conditions, the headlights automatically switch to low beams.
With the steering wheel lever's lighting ring in the position, the daytime running lights (DRL[1]) will illuminate when the vehicle is driven in daylight conditions. The headlights will switch automatically from daytime running lights to low beams in weak daylight or dark conditions. The headlights will also switch to low beams if the front fog lights* and/or rear fog light are activated.
US models: When mode is selected, the daytime running lights can be deactivated in the center display. The parking lights will also be deactivated. In weak daylight or dark conditions, the parking lights and low beams will be illuminated.
In the US: With the lighting ring in the 
or 
position, the daytime running lights will be off.
In Canada: With the lighting ring in the or position, the daytime running lights will be on.
Volvo recommends use of Daytime Running Lights in the US. Its use is mandatory in Canada.Note
Warning
The system is an energy saving aid – it cannot in all situations determine when the daylight is too weak or not strong enough, e.g. when there is fog or rain.
The driver is always responsible for driving the vehicle with lighting that is safe for the traffic conditions and as specified by applicable traffic regulations.