Kylie Jenner and Tyga -- Car Trouble During Beverly Hills Date Night

Kylie Jenner and her bf Tyga tried to make a quick exit during their first date night in front of the paparazzi -- but the valet ... and Tyga's fancy car had other plans.

Tylie (yeah, we said it) have been all over Instagram together, but have never been out together at a big L.A. hot spot ... until Thursday night.

Kylie tried to bolt for the passenger door, while covering her face ... but unfortunately for her ... the valet could not figure out how to open the doors on Tyga's Lambo.

They do eventually make their getaway -- but you gotta see the keystone cops routine while they try to figure out how to get in their ride.

Oh, and she's still 17 and he's still 25. Just for the record.