How to replace the battery in an old Mercedes-Benz C180 COUPE key?

[StSarah]

Tutorial for replacing the battery in an old Mercedes-Benz C180 COUPE key is as follows: 1. You need to 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 holder and press the internal gray button. 2. With the other hand, push the rear end of the key upward. When a gap opens, remove the mechanical key. 3. Take out the rear end by hand and replace the battery. After installing the new battery, reinsert the key holder to complete the battery replacement. Introduction to Mercedes-Benz keys: 1. The lifespan of a Mercedes-Benz key battery is generally two years, while the original factory battery can last up to six years. 2. When the key battery is low, the Mercedes-Benz vehicle will provide two types of alerts: First, when pressing the ignition switch, the dashboard will display a message to replace the key battery. Second, when pressing the lock or unlock button on the key, if the indicator light on the key dims or doesn't light up, it's time to replace the key battery.