Kylie Jenner -- Back on the Road in Fresh New Benz

It's only been 2 days since 16-year-old Kylie Jenner smashed her black Mercedes SUV into another car -- resulting in a 3-car chain collision -- but the little princess is already back on the road ... in a fresh new ride.

Whereas most girls her age would have to ride their bikes after totaling the only car they have, Kylie had a backup Benz ready to roll in L.A. today ... except this one is white. (Understandable. Gotta mix things up a little.)

The "69" t-shirt and super edgy weed socks were a nice touch.