Cars are a symbol of our physical being. If someone else is driving your car in your dream, this might mean that someone else in your real life is in control. If the car is battered or badly in need of repair, then you need to focus more on yourself and your health. Each room represents different aspects of your being. All vivid instances of weather mean something in your dreams, but this is a specific example.
Phones represent messages.
Babies and pregnancy represent something new in your life. If you dream in color, which you rarely hear about because dreams are sometimes blurry after we wake up, the colors themselves mean something, too. Voids in your life, death. Truth, death, fresh starts and new beginnings. Spirituality, some people it also can represent sadness.