Until now, the weaponized Nascars have been dubbed stunticons, omnibots and rallybots, all three names have been rejected by MichaelBay.com’s Nelson. Nelson has since confirmed that they are actually called Wreckers. Wikipedia provides some background on the characters:
The Wreckers are a sub-team of Autobots in the fictional Transformers Universe, functioning essentially as a commando unit.
Filming last week on Michigan Avenue, Chicago, the Transformers 3 crew were using more cardboard head cut outs. This time, lowfatoreo’s YouTube video has highlighted a new character, red faced and angry looking this could be the robot mode of the Ferrari, Rollbar or a Wrecker, my personal guess is that it’s the red Wrecker. Hat tip to Transformers Live for picking this one out.
Until now it’s been presumed that the Mercedes was the latest incarnation of Jolt, however Nelson has dispelled these rumors on the official Michael Bay site, pointing out instead that the Mercedes E550 is the alt mode of the Einstein lookalike robot, that is called Q (“like in James Bond”).