Drones that inventory. Augmented reality glasses giving instructions to workers. Artificial intelligence solutions. More efficient lunch breaks.

Those are a few of the ideas pitched tonight at Mercedes-Benz's Innovation Challenge, a startup competition staged this evening at the Vance plant's training center.

Mercedes-Benz opened its doors to firms from around the world to dream up solutions to challenges on the factory floor. And engineers and innovators came back this evening with their own ideas.