Although it is not highly recommended, it is possible that circumstances force you to leave the car parked on public roads for a long time. As you can imagine, it is a practice that has its risks, both because the car is more exposed to being stolen and because you risk that, when you pick it up again, it will have some mechanical problem derived from having been without moving for a long time and exposed to external agents. negative, such as very high or very low temperatures.

Steps to follow:
First of all, and in case you are tempted, it should be clarified that even if you are not going to use the car for a long time, the vehicle must always have valid insurance. This happens even when you have the car stopped and stored in your private garage. We insist, a car that is not registered with the DGT must always have valid insurance. You may be interested in reading the article how to deregister a car.
If you are going to leave the car parked for a long time in a private place, whether it is an individual garage or a building, we recommend that you cover it completely with a tarpaulin. Thus, you will prevent dust or dirt from entering in large quantities through the different slots in the hood and that these elements end up damaging the engine. However, if you are going to leave the car on the street, placing a tarp over it is not highly recommended, as it is a very obvious sign that the car is going to be parked for a long period of time, with the consequent safety risks.
So that when you pick up the car again, the tires are in good condition, you must leave them fully inflated, at the correct level. If you do not carry out this operation, you run the risk that when you return you will find that the wheels are deformed because the car has been stationary for a long time.
When it comes to gasoline, what you should do is leave the tank half full. In this way, you ensure that the tank is not going to be damaged by being empty of fuel during the entire period in which you leave the car without moving.
For the same reason, it is very convenient that you check other fluids in the car: oil, windshield wipers, air conditioning, etc., to check that they are not at a minimum level when you leave the car parked for a long period. In these circumstances, the corresponding deposits could be damaged by lack of moisture.
If a family member or friend can lend you a hand, don’t hesitate, ask them to move your car from time to time. A car is designed to move and, even if you take all measures to prevent it from deteriorating, leaving it without moving for a long time will end up affecting the mechanics and reducing the useful life of the car.