OTOH the response from Gemini-flash is
Since the goal is to wash your car, you'll probably find it much easier if the car is actually there! Unless you are planning to carry the car or have developed a very impressive long-range pressure washer, driving the 100m is definitely the way to go.In the thinking section it didn't really register the car and washing the car as being necessary, it solely focused on the efficiency of walking vs driving and the distance.