I know I am resurrecting a old/zombie thread, but I became aware of two touchless car wash facilities in the mid cities area. The washyourstuff.com apparently has them in Keller and Grapevine.
I did not use them on my Model S (it still gets a hand wash by me), but I did recently use the Grapevine one (a Kondor system) on my wife's C8. It is touch free and it gets the first layer of stuff off ok (to her satisfaction anyway). Has a dryer and also is right in front of an on-ramp to 114 to do a little extra blow drying
Just a FYI. I think touchless car washes are still a rarity in DFW it seems and this might be handy when the weather is not great for a hand wash.