A dead key fob battery can be frustrating, especially if you are in a hurry. Fortunately, changing the battery in your Mercedes key fob is a quick and easy process that can save you both time and money. In this article, we will provide you with a step-by-step guide on how to change your Mercedes key battery.
Step 1: Identify the Type of Key Fob You Have
Before replacing the battery, it is important to identify the type of key fob you have. The two most common types of Mercedes key fobs are the older-style chrome key and the newer-style SmartKey. The chrome key has a black plastic base with a silver top, while the SmartKey has a chrome-filled center button.
Step 2: Gather Necessary Materials
To replace the battery in your Mercedes key fob, you will need a few materials:
Replacement battery (CR2025 for chrome keys, CR2032 for SmartKeys)
Small Phillips head screwdriver
Thin flathead screwdriver or prying tool
You can purchase replacement batteries at any hardware store or online.
Step 3: Open the Key Fob
Using the small Phillips head screwdriver, remove the single screw located on the back of the key fob. Once the screw has been removed, use the thin flathead screwdriver or prying tool to carefully pry open the two halves of the key fob.
Be careful not to damage the key fob or lose any small parts during this process. If needed, refer to your owner’s manual for additional guidance.
Step 4: Remove Old Battery
Once you have opened the key fob, locate the battery compartment. Carefully remove the old battery from the compartment using the flathead screwdriver or prying tool.
Step 5: Install New Battery
Insert the new battery into the battery compartment with the positive (+) side facing up. Use the flathead screwdriver or prying tool to carefully snap the battery compartment cover back into place.
Step 6: Test the Key Fob
Before reassembling the key fob, test it to ensure that the new battery is working properly. Press any button on the key fob to see if it responds and activates your car’s locking system.
Step 7: Reassemble the Key Fob
If the key fob is functioning properly, you can now reassemble the two halves of the key fob. Carefully align the two halves and press them together until they snap into place.
Step 8: Replace the Screw
Finally, use the small Phillips head screwdriver to replace the single screw on the back of the key fob. Be sure to tighten the screw securely to prevent the key fob from coming apart.
Conclusion
Changing the battery in your Mercedes key fob is a simple process that can be completed in just a few minutes. By following these eight steps, you can quickly and easily replace the battery in your key fob and get back to using your car’s locking system without any problems.
Remember, it is important to identify the type of key fob you have and purchase the correct replacement battery before beginning the process. With a little bit of patience and some basic tools, you can save yourself time and money by replacing the battery in your Mercedes key fob yourself.
