There are mobile car washes that come to your house.

Loocid 3 hours ago | parent | next [-]

That still requires a car present to be washed though.

but you can walk over to them and tell them to go wash the car that is 50 meters away. no driving involved.

	▲	an hour ago \| parent [-]
		[deleted]

Do they involve you walking to them first?

	▲	learingsci 3 hours ago \| parent [-]
		You could, but presumably most people call. I know of such a place. They wash cars on the premises but you could walk in and arrange to have a mobile detailing appointment later on at some other location.