How to Replace the Battery in a Mercedes-Benz E Key?
2 Answers
Replacing the battery in a Mercedes-Benz E key can be done by following these steps: 1. Prepare a new battery: Obtain a new battery that matches the car key's battery model, which can usually be found in the vehicle's user manual. 2. Remove the mechanical key: Push the switch at the bottom of the key upwards to release the mechanical key, then pull it out. 3. Open the key cover: Use the extracted mechanical key to press against the notch on the key and pry the back cover open with force. 4. Replace the battery: Remove the old battery and insert the new one, ensuring the positive and negative terminals are correctly aligned. 5. Close the key cover: Finally, snap the back cover back into place and reinsert the mechanical key.
Replacing the Battery in a Mercedes-Benz E Key? I've done it several times, and it's quite simple. First, there's a small cover on the back of the key with a tiny button or notch next to it. Press or slide it gently to open the cover, and you'll find a coin cell battery inside, usually a CR2032. When removing the old battery, don't use excessive force to avoid damaging the clips. When inserting the new battery, make sure the positive and negative sides are facing the right way—the metal side should be aligned correctly. After closing the cover, test the remote functions. I estimate the key battery lasts about two to three years, so checking it regularly can prevent surprises. If the cover feels loose or there's poor contact, just press it flat with a small card. The whole process takes about two to three minutes, saving you a trip to the repair shop and some money. Keeping a spare battery in your home drawer is a good idea—it lasts for years and avoids the frustration of sudden failure when you're about to drive.
