The question boils down to if they had probable cause or not. IMO, the abandonment exception is kind of hard to apply to something as large and valuable as a car, especially if it was properly registered.
Unless an informant was involved, or contraband was in plain sight, I can't see how probable cause could be formulated for a stationary, unoccupied car short of a K9 alert.
If the car was illegally parked, they could probably do an inventory sarch, but that usually involves towing the car.
The only real remedies to illegal searches are suppression of evidence as to a criminal charge, or a civil suit. Technically, violating one's constitutional rights is a class A misdemeanor under Federal law (a felony if it causes serious bodily injury), but good luck starting a prosecution on that one!
If you weren't physically injured or charged with a crime, then there's not much you can do. Maybe file a complaint with the officer's internal affairs department, but that doesn't benefit you directly.

