Drive an AA Wraith
From Halopedia, the Halo wiki
This is a guide on how to pilot a AA Wraith in any level it appears in. Just Follow the steps below to achieve this task. It is to be noted however that the Wraith will self-destruct once you leave it however.
Step by Step Guide
1. Find a AA Wraith.
2. Take out the gunner if neccesary.
3. Stand on the Hatch(the door) of the Wraith and Melee it off.
4. Once you see the drivers head, position yourself so you do not see "Hold RB to hijack Wraith"
5. Holding RB, shoot the driver in the head until he dies, as once he does you will automaticly enter the Wraith.
