How to Check the Battery Level of a Mercedes-Benz?

[LaWalter]

To check the battery level of a Mercedes-Benz, a battery tester is required for monitoring, as Mercedes-Benz uses maintenance-free batteries without an inspection observation hole. More detailed information is as follows: 1. For the battery, simply checking the voltage is insufficient because the function of the battery is not just to output 12V voltage, but more importantly, to store electricity. Many vehicle batteries show a voltage of 12V but still fail to start the vehicle, which is a phenomenon known as false voltage. Therefore, the battery voltage read from the vehicle's dashboard or measured with a multimeter can only serve as auxiliary references and do not represent the battery's power storage capacity or quantity. 2. By using a battery tester, you can directly see three test results: whether the battery is good, needs charging, or requires replacement. This is the same principle as observing the green, yellow, and black indicators in the inspection hole of batteries that have one. Additionally, the Mercedes-Benz vehicle's onboard computer also monitors the battery level and charging status. When the battery level is low, the dashboard will display a warning about battery discharge or the need for replacement.