I just tested this on my drivers side rear seat. There are two controls that move the seat forwards and back, the seat adjustment control on lower part of the seat and the third-row-entry control on the rear of the seat. The seat adjustment control will only allow the seat to move forward a small distance, and doesn't get any closer to the front drivers seat than 8-10 inches, depending on how far back the drivers seat is. The third-row-entry control slides the second row seat all the way forward so the seat is touching the drivers seat, and will definitely crush legs. As such, and probably described in the user manual, there shouldn't be an occupant in the seat if access to the third row is desired. Although the front seats move up a bit when the third-row-access is initiated, it's not enough to allow space for legs. If you want to take the risk you could manually control the sliding of the second row for third row access, and stop the movement before it crushes legs, but it's not part of the more automatic entry procedure.