How to Replace the Battery in a Mercedes-Benz S280 4MATIC Key?

[StGiselle]

Method for replacing the battery in a Mercedes-Benz S280 4MATIC key: Press the button on the back of the key to pull out the mechanical key; Insert the mechanical key into the slot and apply slight pressure to pop open the key cover; Remove the old battery and replace it with a new one; Close the cover to complete the battery replacement. 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-Benz vehicle will alert the owner in two ways: Pressing the ignition switch will display a message on the Mercedes dashboard to replace the key battery; When pressing the lock or unlock button on the key, if the indicator light on the key dims or does not light up, it is time to replace the key battery.