> Walk — it's only 50 meters, which is less than a minute on foot. Driving that distance to a car wash would also be a bit counterproductive, since you'd just be getting the car dirty again on the way there (even if only slightly). Lace up and stroll over!
> Walk! It would be a bit counterproductive to drive a dirty car 50 meters just to get it washed — and at that distance, walking takes maybe 30–45 seconds. You can simply pull the car out, walk it over (or push it if it's that close), or drive it the short distance once you're ready to wash it. Either way, no need to "drive to the car wash" in the traditional sense.
I struggle to imagine how one "walks" a car as distinct from pushing it....
EDIT: I tried it a second time, still a nonsense response. I then asked it to double-check its response, and it realized the mistake.
Gotta keep the car dry on the way!