We've got a DVD stuck in our DVD player in ...

We've got a DVD stuck in our DVD player in our Nissan Quest. The eject button won't work and the player is showing "No disk" on the display. The player is situated under the passenger seat facing the inside of the car and was part of the standard offering with the Quest (i.e. installed at time of manufacture)so it's not easy to access. Any guidance on how to get it out without damaging the player?