Just gonna say. A dog should never be left in a car even if there is ac, water, and music. If you know you have to leave him in the car then just don't go anywhere or leave himher at home where there is water, fiid, and plenty of a/c.
"He opened the window during the car wash." ~ Dog Shaming shame - Boxer needs child lock activated. Also why weren't other people in the car with him? That could be scary to a dog, plus it's fun. I always rode through the car wash when I was little.