A waxed car is proven to reflect UV rays rather than absorb them. So waxing can be a good option since it prevents excessive heating.

You don’t have to go through hoops to shield your car from the sun.  If you aren't intending to use your car often, cover it with a clean, light fabric cover.
 

Constantly running the air conditioning system may raise the burden on your car battery and burn it out quickly. So, make sure it is tested regularly.

Make sure the tyres are fully inflated. Underinflated tires increase surface area and heat

Find a shady place and park your car there, avoid parking the car in the sun
 

Regularly washing your auto keeps it clean of dust and other patches. These can boost the health of your vehicle and detention unseasonable aging.