in the movie where was jazz's autobot logo? prime's was on his grille, bumblebee's was on his steering wheel and his forehead, ironhide's was on his tailgate, and ratchet's was on his doors. i know on the tftm figure it shows it on his crotch area

 

I know it was on his forehead in the final renderings of the character.
The only time we get a closer look at his face in the movie is when Megs sends him flying backwards towards the camera. I can't remember if you can see it then or not.

 

Yeah right. It's on his forehead, just like Bumblebee. Here's a pic - Sry, it's the best pic I was able to find - You've got to take a close look and you'll see it  


BTW: Optimus also has a 2nd symbol on his steering-wheel:

 

Yeah, it's kinda hard to see the Autobot symbol on Jazz 'cause he's silver, and for some reason or another the Autobot symbols are in neutral colors.

 

It was the Autobot fashion designers on Cybertron.

 

Optimus doesn' have those interiors, they belong to a custom Perterbilt that was sold on ebay.

 

Really? Are you sure? ... Hm - Does anyone have a pic of his "real" interior?
-> Damn... I thought I was sure on that  

 

Left cheek! Left cheek! Left cheek!  

 

from what I remember at botcon 07 it was just a plain truck interior