According to this website this ammo carrier was equipped with a MG34 machine gun.
http://en.wikipedia.org/wiki/Sdkfz_252
"Miscellaneous facts
-Used the FuG15 or the FuG16 radio system
-Transmission had 7 forward and 3 in reverse
-
Was armed with a 7.92 MG34
-Six-cylinder, water-cooled, 3000 RPM, engine"
However, I don't see any MG34 machine gun in any of the pictures.
If it had a MG34 machine gun, was it a CMG or a AAMG?
Cheers, Taskforce