Don't go buying fruity scents like cherry, coconut, etc. That might be alright for a females' car but for a man...The best thing to use is that Deodorant spray
AXE .
There are like 6 different fragrances...all of them work good. Spay the seats (If they are cloth seats), the rugs...spray your ass if you will...Try it and let me know what you think.
P.S.
If your car is more than 4 years old...Don't use that "New Car Scent" bullsh!t...It makes no damn sense.