You mean an Ultra-Magnus? (In Transformers lore, Ultra Magnus is often considered to be the city commander for Autobot City/Metroplex... That is, when they're not having him be leader of the Wreckers, the Autobot Second-in-Command, or a shell driven by a smaller bot in memory of the original.)
If so, Magnum Ultra is a Leader-class AutoMech with a Grand Titan-type Mech mode, and a Indra-like vehicle mode.
- Herb
Sorry, I was typing on my phone. I'm talking about
Metroplex. I forgot Grand Titan / Magnum Ultra was the Metro's original commander [If I remember right, they did that to hide surprise of him becoming who would be the next Autobot leader toywise]. What I was ask if it possible for a non-Leader Class to be code-bonded or team-bonded to a non-Transforming Automech. So Ultra is the commander, he can order the city and it's defenses to act, especially the lesser ones. I remember right G1 toy had walking "Rifleman" like Mech and a small scout car which was extension of the city. If they were team-bond they would all answer city commander.
The fluff for the XTR Syberia had suggested that Leaders were very rare automechs. Thus why I wasn't initially thinking mentioning Ultra. Fortress Maximus would be like that given the original version of him was a headmaster, thus smaller (normal size) transformer could do other things while not being stuck stationary (mostly).