Most people clean their car regularly, and one of the reasons that they do is because of odors. Even air fresheners can’t mask some of the stronger odors. For example, you may like the smell of lavender or cotton. These are light fresheners that won’t overpower the small space of your vehicle. In some cases, cars heat up and cause air fresheners to melt, creating an odorous scent. 
You can always use baking soda and charcoal to shut down smells in your vehicle. Charcoal works well as an air filter in your vehicle because it filters out all of the bad odors. There are also serious smells that you should pay attention to, such as gas that could be a leak in your vehicle.