It was only last year that I finally gave up and joined the automatic transmission crowd, so I'm aware that, for most of the population, not changing gears is a big plus. And in 1939, not changing gears, or at least having help changing gears, was a big plus, especially for the gentler sex. But "a hidden mechanical servant" doesn't so much say "helpful" as it does "stalker creepy."
Odd verbiage, too. "Lightly a Lady's Fingers" sounds like a Barbara Cartland book title, besides leaving you hanging. Lightly a lady's fingers...strangle someone? Knife the mailman? Vote Communist? The mind boggles at the possibilities.