Well it is a trick question due to it being non-sensical.

The AI is interpreting it in the only way that makes sense, the car is already at the car wash, should you take a 2nd car to the car wash 50 meters away or walk.

It should just respond "this question doesn't make any sense, can you rephrase it or add additional information"

I would drive the car to the car wash, because I want to bring the car wash home and it's too heavy for me to carry all the way home.