A free guitar?

I saw an ad yesterday for a Volkwagen car that comes with a free electric guitar with purchase. I don't see a connection between the car and the guitar. Maybe they are encouraging you to play a guitar while driving? Or maybe driving makes you like a rockstar (or playing the guitar makes you a like a race car driver). Who thinks of these promotions? It seems like just about anything can be matched up as a promotion. A free pair of socks with the purchase of a ham. A free curly hair wig with the purchase of a stapler. Anything goes!