How to Replace the Battery in a Mercedes-Benz GLK200 Key?
2 Answers
There is a button on the back of the key. Press this button and slide the back cover forward to open the key. The battery is located in the slot nearby. During the replacement process, it is crucial to pay attention to the battery model. Most Mercedes-Benz keys use a 3V-CR2025 battery. Mercedes-Benz vehicles typically indicate the need for a key battery replacement in two ways: 1. When you press the ignition switch, the dashboard will display a message prompting you to replace the key battery. 2. If the indicator light on the key dims or fails to illuminate when you press the lock or unlock buttons, it's time to replace the key battery.
I've personally replaced the battery in my own Mercedes-Benz GLK200 key a few times when it ran out of power, and the process is actually quite simple—no need to waste money at a 4S shop. First, find a small flathead screwdriver or a tool on your keychain, flip the key over to its backside, and you'll see a small groove or gap. Gently pry open the casing. Second, after opening it, you’ll find the battery inside, usually a CR2025 coin cell. Carefully remove it with a tool, making sure not to mix up the positive and negative terminals. Third, insert the new battery, ensuring the contact tabs are properly secured, then snap the casing back shut. Finally, test the key’s remote function—done! The battery typically needs replacement once a year, and you can buy one at any supermarket for just a few bucks. Doing it yourself saves both money and hassle, eliminating the need for a special trip to the repair shop.
