They have a (custom?) windshield wiper, and finished looking manifolds:
They have a stamped steel chassis:
They have a unique engine:
They have a finished looking dashboard and steering wheel:
They have resolved the exhaust system, and the ground clearance issue:
They have un-textured versions of the interior panels.
They are going to build 23 (or 25) total E series vehicles, to resolve production issues. Then they are planning to build 100 production test vehicles.