Kzin possesses strenght unsurpassed by human beings. Let Seeker take care of the elevator door. Quinn can make use of situation (opened door) and poke around in elevator interior in order to activate passenger ramp. Switch to Seeker and climb into elevator. Try to remove robot by brute force. It's not that easy. Quinn has to slide inflatable bag under robot (Seeker will have to move it again). Now it's possible to use Quinn's rebreather tank on airbag thereby inflating it. Press the switch and control panel slides up. Arrange buttons/screen just like that:

And down we go !