Not even close. In terms of anything, no one can know everything.
Theres a really popular auto EQ system in the home theatre world that Denon uses in their receivers. Pretty much the same concept here. Results are pretty much all over the place.
If you designed the listening area properly, you wouldn't need any of this stuff. Try one of those mats that are placed on the dash, that might help quite a bit if you've got speakers up there.
EQ can only be used to attempt to bring down peaks. Boosting nulls just ruins your speakers by forcing the amps to apply full power there just to attempt to achieve a flat sound. Usually doesnt help because cancellation is generally caused by physical parameters that are best solved by moving components.