My father, my mother, my younger sister and I got into my father's '54 Ford to go to Cordoba, where my parents had rented a house up in the hills.
The three of us started walking down the hill to look at the car, which stopped at the bottom of hill.
Why not had stopped past perfect like in the first one, both are very similar for me: two actions, one before one after?
Is it because the meaning is clear they started walking obviously after the car stopped and that the walk began just after the car stopped (almost the same time frame)
grammar-quizzes.com/past3b.html