It's also baffling to imagine motive. So they couldn't have gone for cash, they didn't keep the car...
Though I understand the detractions that failure to keep the car gives a robbery motive, the car was dealership owned in an age of tracking, that includes potentially tracking well, nearly everything.
In short, they could have intended to sell the car, but were refused by a potential illicit buyer who noted the dealership ownership and feared tracking. Or they formed an internal conclusion about the tracking possibility, or were advised by other criminals of it and encouraged to abandon the car.
Earlier in the discussion it was revealed that while tracking dealership and rental cars is technologically possible, the system(s) need to be actively enabled and that dealerships and rental car companies rarely, if ever do it.
But... the fact that tracking is rarely enabled, however, might not change the possible gangs perception that as the car was dealership owned, it was actively being tracked.