Johnny Manziel Fires Back After NY Car Ambush ... 'Shouldn't Have Came At Me Like That'

Johnny Manziel says he's "hashing it out" with the owner of a NY luxury car rental company who ambushed him in the street Friday night ... but says the guy "shouldn't have come at me like that."

The ambush went down on Friday -- when Wayne (the owner of Precision Concierge) tracked down the QB and confronted him over an expensive Mercedes he allegedly rented and then wrecked in L.A.

Wayne told TMZ Sports ... Manziel had promised to pay for the wrecked ride -- but never did. So, Wayne found him in Manhattan on Friday and tried to get answers right from Johnny himself.

Fast forward to Monday night ... Johnny says the two sides are talking, but he's clearly not happy with the way things went down.