@marbles not really, it was noticed https://lists.openstreetmap.org/pipermail/tagging/2018-May/036119.html, but no actions have been taken, see https://taginfo.openstreetmap.org/search?q=service%3Avehicle#keys (preset in ID, therefore the high numbers). But no scheme whatsoever. This leads to a wild bunch of different tagging schemes. Especially interesting if you try to tag something which offers different vehicles (probably only for rent / repair / parts or a mixture, not everything is a dedicated "standard" shop)