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

[MacValerie]

Mercedes-Benz M-Class key battery replacement steps are as follows: 1. Flip open the tab at the rear end of the key to remove the mechanical key: Insert the mechanical key into the side slot of the key, press the internal gray button, and with the other hand push the rear end of the key upwards. When a gap appears, the mechanical key can be removed. 2. Then use your hand to take out the rear end: You can now replace the battery. 3. After installing the new battery: Reinsert the key holder, and the key battery replacement is complete. The lifespan of a Mercedes-Benz key battery is generally two years, while the original factory battery can last up to six years. When the key battery is low, the Mercedes-Benz vehicle will provide two types of alerts. The first is when you press the ignition switch, the dashboard will display a message to replace the key battery. The second is when you press the lock or unlock button on the key, the indicator light on the key will dim or not light up.