What does the Mercedes-Benz car have to do with the Hippies?

Years ago, Janis Joplin sang a song...I believe it was on her PEARL album....the song contained lyrics..."Oh Lord, won't you buy me a Mercedes Benz, my friends all drive Porsches, I must make amends...." BIG SONG AT THE TIME. I hope this is the answer you were looking for. DM