i just googled 'meat motor' - got lots of pics of motorised meat grinders. sorry about the typo - intention was mittelmotor. could perhaps run with just that and leave the 'gruppe' out - less deriviative that way.
the vintage engine displacement decal w 'mittel motor' underneath? for the rear window.
a deco wing or winged woman (nike - goddess of speed) with 'mittel motor' underneath? for helmets, fenders?
i'd thought about incorporating the stuttgart horse in some way, but without the entire crest giving it context it's got a real ferrari thing going on.
could also create a crest of our own - replace 'stuttgart' with 'mittelmotor' and replace the horse with a monkey rampant (balance, agility) ...