A key point in buying a car is the test drive. After listening to the motor run, look for any leaks, and smell for any abnormal fumes; you should take the car out for a test drive. It is important to let the car warm up a little to see if it has heating problems. Try turning on the car while you are inspecting the car to warm it up for the test drive.
There are many things that you should pay attention to while on a test drive. Just like when you examine the motor while it was parked, you should use your different senses. Listen for any abnormal sounds, like any squeaks, grinds, or loud motor sounds. While driving, turn on the AC and feel how well it cools, but also smell to see if any bad fumes come through the vents; these smells can mean expensive repairs. After checking the AC, turn it off and roll down the windows. Try and smell is the motor is creating fumes; cars should not produce an strong odors while driving. Finally, try and pay attention to how much the car bounces while driving; if the car bounces too much the suspension might be going bad. Also make sure to notice how much the car vibrates. There should not be very much vibrations while driving, at a stop or while braking.
Most importantly make sure you feel comfortable in the car. Whether you are on a long drive or stuck in traffic, you are going to want to be comfortable in the car. So make sure you pay attention to these details and ask the seller any questions you may have. If you feel that you cannot notice these details, don't be afraid to ask a friend to join you.
Here are some resources that can help you understand what you feel, smell, or hear as you take your test drive.
