Ermm. For example you are in a new shopping centre car park, you are dead sure that u park at level B2. But you lose your sense of direction because you came down from another lift lobby.
So you hope to unlock your car with the headlight turn on so that you can spot your car?
Second senario, you parked your car in open air and it is raining cats and dogs. Unfortunately, you did not bring an umbrella. The car is running distance from the shelter where you are standing.
Under normal circumstance, you will use your remote to unlock your car first, make a dash towards the car, open the door quickly, sit and close the door. Of course, alternatively you can also run towards your car, while holding on to your remote and unlock the car when is nearer to the car.
But I will prefer the first option.