Tutorial on Replacing the Battery in an Older Mercedes-Benz CLS55-AMG Key

1 Answers
JulietteLee
07/29/25 8:49pm
Detailed instructions for replacing the battery in an older Mercedes-Benz CLS55-AMG key are as follows: 1. To replace the battery, first locate the button on the back of the key: After finding the button, press it and slide the back cover of the key forward to successfully open it. You will then see the battery in the adjacent slot. Open the slot, remove the old battery, and replace it with a new one. Next, reattach the back cover of the key to complete the battery replacement. 2. Pay special attention to the battery model when replacing the key battery: The remote key for Mercedes-Benz cars uses a 3V CR2025 battery, which can be purchased at stores. Also, note that the car remote key contains a battery that typically lasts 2 to 3 years. 3. Mercedes-Benz vehicles use two methods to indicate low key battery: One is when you press the ignition switch, the Mercedes dashboard will display a message to replace the key battery; the other is when you press the lock or unlock button on the key, if the indicator light on the key dims or does not light up, you should promptly replace the key battery.
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