If you've ever asked yourself "What kind of music does Beck write?" this is not the song that will give you the answer.
This is a song without a type, pure whimsy - heavy guitars switching to doo-wop, a verse of almost '60s classical elegance if not for a chugging bass/drum accompaniment, a chorus that is simply dance music with harpsichord going on pure baroque runs. The middle breakdown is brutal shredding metal that pops on a dime into malt-shop vocal harmony, before the two elements meld in a thrilling unholy alliance.
Absolutely essential whimsical Beck bravado, one if his greatest pieces.
And by the way, the metaphor of a rental car is about the impermanence of human life. So there's that.