"I haven't driven this one, but I've driven a Batmobile before." Not going to mention the last times, he'd been Batman himself. No need to let Bruce know that THAT passes on as well. At least, sometimes.

He climbs in, adjusting the seat slightly before starting the engine. The hum of the engine is different than he's used to, but there's nothing wrong with that. He puts it into gear and drives out of the garage area. "You're the local. Where's the nearest shop that would have what we need?"