Light switch function

[Budnbree]

Hi just bought a 57 focus mk2 1.8 tdci couple days ago , just getting used to / trying things and I've noticed on the light switch when in the off position the switch can be pushed in as if it is switching something but I can't see anything happen . Does this use have a function ? Pic included of type of switch 

[Micro]

Push in and turn to the left you will get parking lights (basically your sidelights with no warning buzzer).

[Stoney871]

As above, but don't leave the park light on as it drains the battery pretty quickly.

[Budnbree]

Thanks guys .. was my sure if it changed something by just pushing in ... don't think I will use parking lights but at least I know what it does now :-) cheers again ..