How to Replace the Battery in Your 2020 Mercedes Key Fob

A dead key fob battery can be a major inconvenience, especially when you’re trying to get somewhere important. If you’re driving a 2020 Mercedes, you’re in luck. Replacing the key fob battery is a quick and easy process that can be done in just a few minutes without any special tools.

What You’ll Need to Replace Your Mercedes Key Fob Battery

Before you get started, gather the following items:

• A new CR2032 battery (This is the most common type of battery used in Mercedes key fobs. However, it’s always a good idea to check your owner’s manual to be sure).
• A small flat-head screwdriver or a plastic pry tool

Step-by-Step Guide to Replace Your Mercedes Key Fob Battery

Once you have your materials, follow these simple steps:

1. Locate the release button on the back of your key fob. This is a small, round button typically located near the bottom of the fob.
2. Press and hold the release button while gently sliding the metal key out of the fob.
3. Locate the small notch or slot on the side of the key fob. This is where you’ll insert your flat-head screwdriver or pry tool.
4. Carefully insert the screwdriver or pry tool into the notch and gently twist to pry open the key fob. You should hear a slight click when the two halves of the fob separate.
5. Remove the old battery from the fob. It should be sitting in a small compartment on one side of the fob.
6. Insert the new battery into the compartment, making sure that the positive (+) side is facing up.
7. Align the two halves of the key fob and press them together until you hear a click. This indicates that the fob is securely closed.
8. Reinsert the metal key into the fob and test the buttons to make sure the new battery is working properly.

Tips for a Successful Key Fob Battery Replacement

While replacing your Mercedes key fob battery is relatively simple, here are a few additional tips to keep in mind:

• If you’re having trouble prying open the fob, try using a thinner screwdriver or pry tool. Be careful not to use excessive force, as this could damage the fob.
• When inserting the new battery, make sure it sits flush in the compartment. If the battery is not properly aligned, it may not make contact with the terminals, and your key fob won’t work.
• Avoid touching the battery terminals with your fingers. This can cause corrosion and shorten the life of the battery. If you do accidentally touch the terminals, wipe them clean with a dry cloth before inserting the battery.
• Once you’ve replaced the battery, test all the buttons on your key fob to make sure they’re working properly. If any of the buttons are not responding, try removing and reinserting the battery or repeating the replacement process.

Common Issues When Replacing a Mercedes Key Fob Battery

While the steps above should help you replace your Mercedes key fob battery successfully, you might encounter some common issues:

Problem: The key fob still doesn’t work after replacing the battery.
Solution: Double-check that you installed the correct battery type and that it’s properly seated in the compartment. If the battery is inserted correctly, there might be an issue with the key fob itself, and you might need to consult a qualified automotive locksmith or your Mercedes dealership for further assistance.

Problem: The key fob works intermittently or has reduced range.
Solution: The battery contacts inside the key fob might be dirty or corroded. Try cleaning the contacts with a cotton swab and some rubbing alcohol. Allow the contacts to dry completely before reinserting the battery and testing the fob again.

Get Back on the Road With a Working Key Fob

Replacing the battery in your 2020 Mercedes key fob is a straightforward task that anyone can handle. By following the steps outlined in this guide, you can get back on the road quickly and easily.

However, if you encounter any difficulties during the replacement process or have concerns about damaging your key fob, it’s always best to consult a professional automotive locksmith or your Mercedes dealership for assistance. They have the expertise and specialized tools to handle any key fob related issues safely and effectively.

Frequently Asked Questions

Q: How often should I replace the battery in my Mercedes key fob?
A: Typically, a Mercedes key fob battery lasts between 3 to 5 years. However, factors like usage frequency and environmental conditions can impact battery life. It’s a good practice to replace the battery preventatively every 3 years to avoid unexpected inconveniences.

Q: Can I use any brand of CR2032 battery for my Mercedes key fob?
A: While using a reputable brand is recommended, most CR2032 batteries should work. Ensure the battery has the correct voltage (3V) and dimensions to fit your key fob’s battery compartment.

Q: What should I do if my Mercedes key fob gets wet?
A: Act quickly if your key fob gets wet. Remove the battery immediately and shake out any excess water. Let it dry thoroughly for at least 24 hours before reinserting the battery. If the key fob still doesn’t work after drying, it might have suffered water damage and need professional attention.

Need More Help?

Do you have other questions or need assistance with your Mercedes key fob? We’re here to help!

Contact us via Whatsapp at +1 (641) 206-8880 or visit us at our shop located at 1326 N Houston St, Amarillo, TX 79107, USA. We have a team of automotive Key Fob Programming experts available 24/7 to assist you with any key fob related issues, including battery replacement, key programming, and fob repairs.

We also have a wealth of information on our website, KEYFOBPROG.com, covering various car key and key fob topics. Check out our other blog posts for more helpful tips and guides!