I heard this ad too, and had the same surprised reaction. But I didn't even remember it was for cars!

I've heard it twice, and was hoping to hear it again to pay more attention and remember the company to try and track information about it down online. I was also wondering how the ad came to use the line of the song.

I'll put this in the same boat, so to speak, as the car company that a few years ago did an ad using the tune of "What shall we do with a drunken sailor." I seem to recall that when asked about it, they claimed not to know that song, and to claim the tune was something else.