How to Replace the Battery in a Mercedes-Benz C260 Key?

[HarperDella]

1 flathead screwdriver, 1 car key that needs battery replacement, 1 battery. Locate the gap in the middle of the top end of the key. Insert the flathead screwdriver into the gap. Pry the key up and down until a gap is created. If the key doesn't budge, gradually increase the force. Gently push one side of the battery with your finger and remove it. Place the new battery with the positive side facing up into the key's battery slot. Gently push the battery until it is fully secured. Align the two separated halves of the key and press both sides with your hands until the upper and lower parts are completely joined. Insert the mechanical key into the gap.

[VonSavannah]

I've been driving a Mercedes-Benz C260 for several years and have changed the key battery myself—it's actually quite easy. The key is usually foldable; start by locating a small gap or groove on the side, then gently pry open the back cover using a thin plastic tool or a coin. Avoid using excessive force to prevent cracking the cover. Once opened, you'll see a small button battery, typically a CR2025 model. When removing the old battery, avoid touching the metal contacts with your fingers to prevent static damage to the electronic components. Insert the new battery with the positive side facing up (the side marked with a plus sign). Then, snap the cover back on until you hear a click, indicating it's securely in place. Finally, test the remote functions by pressing the lock and unlock buttons to ensure they work properly. The whole process takes about five minutes, saving you the hassle and cost of visiting a repair shop. It's advisable to periodically check the battery life to avoid being stranded due to a dead battery at a critical moment. Remember to buy compatible batteries from supermarkets or online, and make sure you get the correct size.

[VonBrooke]

I'm a hands-on person, so preparing the right tools is essential when replacing a Mercedes key battery. Get a small flathead screwdriver or a hard plastic card—avoid using metal objects to prevent scratching the casing. Purchase a new CR2025 battery, which costs just a few dollars at the supermarket. When opening the key's back cover, be gentle and slowly pry it open along the seam without rushing. Inside, there are small metal contacts, so wash your hands to remove oils and prevent corrosion before handling. Don’t casually throw the old battery in the trash; recycle it for environmental reasons. Align the new battery correctly, then firmly press the cover back into place to ensure it snaps securely. Test the remote function in your car immediately after replacement. If the range shortens or there’s no response, the contacts might be dirty and need wiping with a dry cloth. The process is simple, but caution is key to avoid malfunctions. It’s recommended to do this every two years to prevent sudden failures that could disrupt your travel convenience.

[SanLane]

I just replaced the battery in my Mercedes key, and it was super easy. There's a small groove on the back cover of the key, and I could just pry it open with my fingers or nails. Inside, there's a round coin battery, CR2025. I took out the old battery and tossed it aside, then put in the new one with the positive side facing up, closed the cover, and pressed it shut. Tested the remote, and everything works fine—did it all myself without spending a penny. Saved the hassle of going to the dealership.

[DeBenjamin]

Here's a quick guide to replacing your Mercedes key battery: 1. Use a thin tool to pry open the back cover of the key along the seam; 2. Remove the old battery, note the positive terminal position, and place the new CR2025 battery with the positive side up; 3. Firmly press the cover until you hear a click. The whole process takes just two minutes. After replacement, test the key's lock/unlock functions to ensure proper operation. Don't delay too long to avoid dirty hands affecting the contacts.