Kanye West MUST be getting serious with Kim Kardashian -- he's letting her drive his $500,000 whip in L.A. while he's in NYC.
We got this pic of Kim driving Kanye's Mercedes SLR McLaren this AM to Barry's Boot Camp in Sherman Oaks.
Kim's family just signed a $40-plus million deal with E! for their reality shows, so she could probably afford to buy her own.
BTW, Kim owns a Range Rover, a Ferrari, a Bentley ... oh, and a Rolls Royce Ghost ... but it's way more fun to drive your boyfriend's car.