4. That guy Mark can sing
From Beethoven to Jay Z, you’ll be floored by the volume and quality of the optional Mark Levinson audio system, outputting 835-watts of power through 17 individual speakers.
After a quick demo, my mother, the classical music buff, now wants a GS… to park in her living room.
And perhaps most impressive, at eardrum bursting levels, your music is barely audible outside, so you can crank that Carly Rae without the public shame.