Tinting the sunroof of a Tesla Model 3 can help reduce glare and heat inside the vehicle, making for a more comfortable driving experience. It can also protect the interior of the car from fading and damage caused by the sun's rays. In addition, tinted windows can provide privacy and security by making it more difficult for outsiders to see into the vehicle. Ultimately, tinting the sunroof can help enhance the overall look and functionality of the car.