How to Replace the Battery in a Mercedes-Benz CL550 Key?
2 Answers
To replace the battery in a Mercedes-Benz CL500 key, you need to press a hidden button. Here are the detailed steps: 1. Turn the Mercedes-Benz CL500 key to its side, where you can see a button with a key symbol. 2. Press the button to eject the mechanical key and remove it. 3. After removing the mechanical key, you will notice a concealed button at the top. 4. Use a sharp object like a pen tip, toothpick, or needle to press this button. 5. Once the button is pressed, the key will automatically split into two halves. The left half contains the electronic battery, which can be removed and replaced with a new one.
Last time I replaced the battery for my Mercedes CL550 key, I found it actually quite simple. First, prepare a CR2032 coin cell battery, which can be easily bought at supermarkets. There's a small groove on the back of the key—use a coin to wedge into it and gently pry, then the casing will pop open. Be careful not to use overly sharp tools to avoid scratching the plastic shell. Inside, use a fingernail or toothpick to lift the metal tab in the battery compartment and remove the old battery, remembering the orientation with the positive side facing up. Insert the new battery in the same direction until you hear a click, indicating it's properly seated. Finally, close the cover and press firmly along all edges. After replacement, remember to test the remote range near your car—sometimes poor contact can cause unresponsiveness. The whole process takes just five minutes, completely eliminating the need to waste money at the dealership.
