Test-Driving is usually done on any model vehicle that you wish to buy to find out whether that model is suitable for your requirements. You might have some presumptions about a particular model but everything would be cleared when you test-drive a car of that model.
The salespersons often give you facts and figures about the car being very fast and being very good (‘blah blah blah’), and it will be difficult for you to track them. So you have to look for yourself whether that car suits you. See whether you can get into the car easily. You need to check whether you are comfortable while you sit in the driver's seat. Check for the adjustments that can be made to adjust the level of the seat to suit your requirements so that it will be easy for you to use the pedals. Some cars have the steering wheel fixed and some can be adjusted to your level. You need to check this also. If the steering wheel is fixed, see whether it is at a comfortable level for you to handle.
You can also check the seat belt to see whether it is tight over your neck or loose on your shoulders. See whether the transmission is easily accessible to you and whether you can shift the transmission easily.
Always keep in mind the job of a salesperson is to sell that vehicle to you and he might not know your exact needs, so you will have to check them out for yourself. See whether you have enough space in the trunk to keep your essentials or whatever you buy. Check the rear seat if it is suitable for the passengers who sit in the rear seat. Check whether the back seats are comfortable for your kids.
Check for the visibility while you sit in the driver seat. You must be able to see clearly over your shoulder. Have a look at the instrument panel and the dash accessories. See whether you have difficulty in reading the different gauges available. See whether they are properly illuminated and easily accessible. How about accessing your stereo system while you drive? Can you change the air conditioning while you drive? These are some of the factors that need to be checked when you are test-driving any car before you decide to buy them. Engine noise, hill climbing power, braking and suspension are the other factors that you should be looking at.