Quote Originally Posted by Seraphim Prime View Post
Masterpiece Wheeljack has a mustached face hidden behind his mouthplate!

Like MP1 convoy before him, the MP designers have had a bit of fun and given Wheeljack an actual face behind the plate. I don't have a photo, but if you go to Seibertron, you'll see what I mean.

It appears you need to unscrew the two half of the heads to open it up and see.
Something similar behind MP Ultra Magnus's face too.