First responders are facing a new threat — cars. Cutting into a 1994 Tercel isn’t the same as cutting into a 2016 Leaf. Whether it’s high-voltage cables, batteries in odd locations or other newfangled engineering trickery, being a first responder ain’t easy. But Mercedes is hoping to make it a bit easier, using augmented reality. Rescue Assist is an app Mercedes-Benz created for first responders. It provides a wealth of data on all its cars, including commercial brands, so first responders know the best way to enter a vehicle. Now, it’s added augmented reality, giving folks a better idea of what parts are where underneath all that sheet metal.