Tutorial on Replacing the Battery for an Older Mercedes-Benz C280 Key

1 Answers
JaylaRose
07/25/25 12:55am
Tutorial on replacing the battery for an older Mercedes-Benz C280 key 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 side slot of the key and press the internal gray button. 2. With the other hand, push the rear end of the key upward. When a gap appears, remove the mechanical key. 3. Use your hand to take out the rear end and replace the battery. After installing the new battery, reinsert the key holder, and the key battery replacement is complete. Additional information about Mercedes-Benz keys includes: 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, pressing the ignition switch will display a message on the dashboard prompting to replace the key battery; second, 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.
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