True parking lights don't waste extra energy by lighting up the interior buttons and gauges -- ie European parking lights
What we call parking lights is what European refer to as "city lights", where with enough ambient lighting from street lights in the city, one can drive with the markers on with the dash illuminated.
On VW's it's activated on the turn signal switch. It's the "P with the lines next to it" When the car if off, push up or down to activate the parking light.
Benz, iirc, is on the headlight switch, keep turning the switch counter clockwise past off. I forget where BMW puts it.