Hi, Try with a friend one opperating the door handle from the outside with the person lifting the locking knob inside the car at the same time ( If that makes sense, If that does not work Push the drivers seat as far forward as it will go remove the base of the rear seat take offthe door handle + the Locking knob, if it had a ashtray there will be one internal screw, the the handle itself, be carefull on this start to pull the door panel away from the main door frame you then can access the mech of the lock. A long screwdriver will be needed to unclip the lock.