You need to carry the following documents while driving a car:
Car insurance
Driving License
Pollution Under Control (PUC) certificate
Registration Certificate (RC) of the car
You will have to pay heavy fines and/or face imprisonment if you drive a car without these documents. Thus, always make sure to print multiple copies of your online motor insurance policy and take photocopies of other documents for a hassle-free drive. Remember to get the PUC of your car updated every 6 months.