Limo with a sink on the fender, 1940

In 1940, "foreign limousines" came with hot and cold running water in a washbasin on the front fender:


THIS new foreign limousine has a hot and cold water folding wash-basin of aluminum built into its right front fender. Beneath the hood is a 2-compartment tank holding two and a half gallons of water. The hot water section is heated by exhaust gases passing through a spiral pipe. The two faucets give water of any desired temperature. The basin is automatically emptied when it is folded into the fender.

Where Do They Keep The Towels? (Feb, 1940)