Where is the negative terminal of the Audi A4 car battery?

[VanJaxon]

The battery of the Audi A4 is located in the trunk. The positive terminal is next to the air filter in the engine compartment, and there is a cover on the positive terminal. The negative terminal is behind the positive terminal, and it is a metal post without a cover on its surface. Additional information is as follows: 1. Many cars that place the battery in the trunk will have positive and negative terminals set up in the engine compartment. This is for the convenience of jump-starting, both for helping others and for others to help you. 2. If the battery is dead, the only way to start the engine is by jump-starting, which requires using cables to connect the terminals of two cars.