Car wash mode
Allegedly the "car wash mode" is "turn off the windscreen wipers, wind up the windows, don't fold the mirrors, lock the charging cover flap that otherwise opens if something touches it".
If you're going to put all the controls on touchscreen menus (hint - you shouldn't), then having a "mode" that does all of them at once isn't as ridiculous as it first sounds.
If it can't handle Edinburgh rain it's not surprising it can't handle a car wash, but the mode won't help with that.
https://www.edinburghlive.co.uk/news/edinburgh-news/edinburgh-couple-fume-handed-17k-27906242.amp
Nowhere close to the promises Musk was making about it, of course.
"Cybertruck will be waterproof enough to serve briefly as a boat, so it can cross rivers, lakes & even seas that aren’t too choppy"
https://twitter.com/elonmusk/status/1575508498430820352?lang=en
"We are going to offer a mod package that enables Cybertruck to traverse at least 100m of water as a boat.
Mostly just need to upgrade cabin door seals."
https://twitter.com/elonmusk/status/1736943517115482218?lang=en