How to Replace the Battery in a New Mercedes-Benz C240 Key?

[Jones]

Mercedes-Benz C240 key battery replacement method is as follows: 1. First, flip open the tab at the rear end of the key to remove the mechanical key. Insert the mechanical key into the slot where the tab is located and apply slight pressure to pop open the back cover. 2. During the replacement process, be sure to note the battery model. After prying open this slot, remove the old battery and replace it with a new one. 3. After installing the new battery, close the back cover to complete the key battery replacement. Note: The lifespan of a Mercedes 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 vehicle will provide two types of alerts: one 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, signaling that the key battery needs replacement.