How to Replace the Battery in an Older Mercedes-Benz S65L-AMG Key?
2 Answers
The steps to replace the battery in an older Mercedes-Benz S65L-AMG key are as follows: 1. Determine the battery model; the battery model for the older Mercedes-Benz S65L-AMG is 3V-CR2025. 2. Prepare the necessary tools, such as nail clippers, a coin, or a paperclip. 3. Insert the nail clippers directly into the side (inside the key slot) and pry it open. 4. Once opened, you will see the battery; use the paperclip to gently pry it upward, and the battery can be removed. 5. Replace it with a new battery, then close the key cover. Be careful not to reverse the positive and negative poles when replacing the battery.
I've been driving my old Mercedes for over a decade, and changing the key battery myself is the quickest solution. For the older S65L-AMG model, there's a small button on the back or side of the key—press it and pull to remove the metal blade. Then, use a coin or small screwdriver to gently pry open the plastic casing. Inside, you'll find a round battery, model CR2032. Make sure to get the right one; it costs just a dollar at the supermarket. When removing the old battery, handle it carefully to avoid damaging the contacts. The new battery must be inserted with the positive side facing up, or it won't work. Finally, snap the casing back together and reinsert the metal blade. After replacing, press the remote buttons a few times to test the lock and light functions. If the casing feels too tight, don’t force it to avoid breaking the clips. Keep spare batteries in your car to prevent being stranded with a dead key. Overall, doing it yourself saves money and time—just ten minutes, and you’ll pick up some handy repair skills too.
