Why bother keeping it in your car?
If a situation occurs and you have to go to your car to retrieve it a prosecutor will ask why did you not get in your car a mins drive away?
Going to get s gun makes you an aggressor in the eyes of the law . And you can lose the ability to plead self defense .
Except in the case of an active shooter ..which could be seen as justified .
People who leave guns in cars get them stolen, have low familiarity with their pistol and are not really in a good position to use it for self defense .
I would politely recommend getting a good holster and carrying the pistol.