Hell (2011) on Netflix

Plot summary

Marie, her younger sister Leonie and Phillip, Marie's boyfriend, drive across a Germany turned to wasteland after solar flares stripped the atmosphere and temperatures climbed. Daylight itself is dangerous, so their station wagon carries metal mesh and taped-over windows, and they strip abandoned cars and filling stations for fuel, water and food, alert for hostile survivors. They are bound for the mountains, where water is said to remain. At a ruined station a hooded man takes their supplies and holds Leonie; he says he is a mechanic, Tom, and will repair their heat-damaged engine if they let him ride along. Phillip agrees. A metal structure blocks the mountain road, and the group is lured into an ambush.