Stralis Euro 6 Headlights

I am currently driving a 64 plate Stralis as a hire truck while mine is in for repair. Can anyone tell me please / help regarding the headlights as unlike my other truck there is only one position you can turn the headlight switch to and when on this they don’t seem to be very bright more like sidelights. Is there another switch anywhere as all I can find is fog and main beam. there is a button next to fog lights that looks like a light button but when i press it the lights dont seem any brighter and nothing comes on the dash.

My second question is can you turn the drls off when parked up as not to annoy other drivers when parked up and got engine running while warming the truck up.

Cheers