I have not been to Praia da Luz yet and therefore don't have a feel for things on the ground near the apartment,
but it is clear and has been mentioned several times that the apartment is built on a slope. The ground level of the car park to the front is significantly higher than that of the house.
It seems to me that in order for a person inside that window to have a reasonable view of the car park, particularly in the dark, given that the car park is at a higher level than the house and that the view of it from inside the house is partially obscured by the little wall in front of the path, the shutter would have to be right up to the top and the person inside the house possibly kneeling or bending down slightly and looking upwards out of the window.
In other words, not something easy or comfortable to achieve, especially with a bed in the way and time not on one's side.
Can anyone with knowledge of the block confirm these angles?