How to Replace the Battery in a Mercedes-Benz E-Class Key?

[MariaRose]

The method for replacing the battery in a Mercedes-Benz E-Class key is as follows: 1. Press the rectangular button on the top of the key; 2. While pressing the button, slide the black cover to the left; 3. Pull down the cover marked with +-; 4. Remove and replace the battery. Below are some precautions for using the key: 1. In daily use, some of our actions can easily damage the car key, such as dropping it from a height. Many owners may have tried giving the key to their children as a toy, but children don’t understand and may throw it around. The internal circuitry of the key is relatively fragile and can be easily damaged by strong impacts. Another situation is water damage—if water seeps inside and damages the circuit, it can cause the remote to malfunction. 2. If the remote key gets wet, do not shake it vigorously or press any buttons, as this can cause water to seep into other important circuits. Also, avoid using the remote to unlock the car immediately, as this may burn out the circuit board. The correct approach is to open the key casing, lay it flat, and use a hairdryer to dry it before checking it again.