There is a long history of musicians singing about their cars, from the Beach Boys’ Little Deuce Coupe, to Janis Joplin asking for a Mercedes Benz, to Prince’s Little Red Corvette that wasn’t really a Corvette. But this trend really took off in the 90's with the growing appeal of hip hop. Seeming every rapper in every song had to call out their car(s). And as a listener, you had to know the model because often times the brand wasn’t mentioned. So a “Six-hunnid” is a Benz 600. And a “Four-dot-six” is the Range Rover 4.6 HSE. And it had to be the 4.6, as only schlubs would drive the 4.0. The Rover’s rise in name drops also coincided with a rise in general prominence. I can’t say that was due to hip hop, but it sure worked for the Escalade.