What happens next?

How to check car battery water levels
Locate the battery.
In most cars, you simply need to open the hood of your car to access the battery.
Some batteries are located lower in the engine compartment, behind the front bumper and ahead of the front wheels.
These are sometimes accessed from the bottom and need to be removed for service. Most bmw and mercedes benz batteries and a few others are located in the trunk, concealed in an isolated compartment.