"Nelson" the forum administrator at shootfortheedit.com, Michael Bay's official website has posted the following:
IIRC, the blue Mercedes and the Einstein-looking bot are the same.
If you can't remember the Einstein-looking bot, click here.
Click here to see it for yourselves.
This does not mean however that Jolt isn't in the movie, he might still be part of it.
Stay tuned to seibertron.com for all your Transformers related news!