Is your Mercedes-Benz key fob acting up? If the buttons are becoming less responsive or if the range seems to be getting shorter, it’s probably time to change the battery. Replacing the battery is a quick and easy process that can be done at home with just a few simple tools. In this article, we’ll walk you through the steps on how to change the battery in your Mercedes-Benz key fob, so you can get back to driving with peace of mind.
Before you start, you’ll need to gather a few tools. You’ll need a small Phillips head screwdriver, a flathead screwdriver, and a new CR2025 battery. Once you have your tools, you can follow these steps to change the battery in your Mercedes-Benz key fob:
First, locate the small screw on the back of the key fob. Use the Phillips head screwdriver to remove the screw. Once the screw is removed, you’ll be able to open the key fob by prying it open with the flathead screwdriver. Be careful not to damage the key fob when you’re opening it.
Insert the New Battery
Once you have removed the old battery, it is time to insert the new one. Here are the steps on how to do it:
- Make sure that the new battery is the correct type for your key fob.
- Orient the new battery correctly in the battery compartment. The positive (+) side of the battery should be facing up.
- Gently press down on the new battery until it clicks into place.
- Replace the battery cover and secure it in place.
- Test your key fob to make sure that it is working properly.
Here are some additional tips for inserting the new battery:
- Be careful not to touch the metal contacts on the battery or the battery compartment.
- Do not use a metal object to insert the battery.
- If you are having trouble inserting the battery, try using a pair of tweezers.
Battery Replacement Cost
The cost of replacing a Mercedes key fob battery will vary depending on the make and model of your vehicle.
| Vehicle | Battery Replacement Cost |
|---|---|
| Mercedes-Benz C-Class | $50-$100 |
| Mercedes-Benz E-Class | $75-$125 |
| Mercedes-Benz S-Class | $100-$150 |
Test Your Key Fob
Before you start to change a battery, first, you should test your key fob to make sure that the battery is the problem. In order to test the key fob, do as follows:
1. Gather your materials. You will need a new battery for your key fob, a small screwdriver, and a pair of pliers.
2. Open the key fob. The key fob will have a small screw on the back that you will need to remove with a screwdriver. Once you have removed the screw, the key fob will come apart in two pieces.
3. Inspect the battery. The battery will be a small, round battery that is located in the center of the key fob. If the battery is corroded or leaking, then it will need to be replaced.
4. Replace the battery. If the battery is corroded or leaking, then you will need to replace it with a new battery. The new battery will be the same size as the old battery, and it will be inserted in the same way.
5. Close the key fob. Once you have replaced the battery, you will need to close the key fob. The two pieces of the key fob will snap back together, and you will need to replace the screw that you removed in step 2.
6. Test the key fob. Once you have closed the key fob, you will need to test it to make sure that it is working properly. Press the buttons on the key fob and see if they work. If the buttons do not work, then you may need to replace the battery again.
7. If you have tried all of the above steps and your key fob is still not working, then you may need to take it to a locksmith or a car dealership to have it repaired or replaced.
How to Change Battery Mercedes Key Fob
Replacing the battery in a Mercedes key fob is a simple task that can be completed in just a few minutes. Here are the steps on how to do it:
1. Locate the key release button on the side of the key fob.
2. Press the key release button and pull the key out of the fob.
3. Use a small screwdriver or a coin to pry open the back of the key fob.
4. Remove the old battery and replace it with a new one of the same type.
5. Snap the back of the key fob back into place.
6. Test the key fob to make sure it is working properly.
Additional Tips for Keyless Entry Systems
In addition to changing the battery in your Mercedes key fob, there are a few other things you can do to maintain your keyless entry system. These include:
- Keep your key fob clean. Dirt and debris can build up on the key fob over time, which can interfere with its operation. Regularly clean the key fob with a soft cloth and mild soap.
- Avoid exposing your key fob to extreme temperatures. Extreme heat or cold can damage the key fob’s electronics. Store your key fob in a cool, dry place.
- Don’t drop your key fob. Dropping your key fob can damage the electronics or break the casing. Be careful when handling your key fob.
- Replace the battery in your key fob when it starts to get weak. A weak battery can cause the key fob to malfunction. Replace the battery as soon as possible to avoid getting stranded.
- Reprogram your key fob if it stops working. If your key fob stops working, you may need to reprogram it. You can do this yourself using the instructions in your owner’s manual.
- Contact your Mercedes dealer if you have any problems with your keyless entry system. If you have any problems with your keyless entry system, contact your Mercedes dealer. They will be able to diagnose and repair the problem.
- Use a keyless entry app. There are a number of keyless entry apps available that allow you to use your smartphone to unlock and lock your Mercedes. These apps can be convenient, but they also rely on your smartphone’s battery. Make sure to keep your smartphone charged if you are using a keyless entry app.
- Here is a table with some additional tips for keyless entry systems:
Tip Description Keep your key fob close to your body. This will help to ensure that the signal from your key fob is strong enough to reach your car. Avoid placing your key fob in your pocket or purse with other metal objects. Metal objects can interfere with the signal from your key fob. If you are having trouble unlocking or locking your car with your key fob, try moving closer to the car. This will help to ensure that the signal from your key fob is strong enough to reach the car.
Troubleshooting Battery Replacement Issues
Problem: Key fob is still not working after replacing the battery.
If the key fob is still not working after replacing the battery, there may be another issue. Some possible causes include:
- The battery is not making good contact with the terminals. Try removing the battery and reinserting it, making sure that it is seated correctly.
- The battery is dead. Even if the battery is new, it may be dead. Try replacing the battery with a new one.
- The key fob is damaged. If the key fob has been dropped or damaged, it may need to be replaced.
- The car’s battery is dead. If the car’s battery is dead, the key fob will not be able to work. Try starting the car or charging the battery.
Problem: The key fob works intermittently.
If the key fob works intermittently, it may be a sign that the battery is low. Try replacing the battery with a new one.
Problem: The key fob’s range is limited.
If the key fob’s range is limited, it may be a sign that the battery is low. Try replacing the battery with a new one.
Problem: The key fob’s buttons are not working.
If the key fob’s buttons are not working, it may be a sign that the key fob is damaged. Try cleaning the buttons with a cotton swab and rubbing alcohol. If the buttons still do not work, the key fob may need to be replaced.
How To Change Battery Mercedes Key Fob
To change the battery in a Mercedes key fob, you will need a small Phillips head screwdriver and a new battery. The battery is a CR2025 3-volt battery.
1. Use the screwdriver to remove the two screws on the back of the key fob.
2. Once the screws are removed, gently pry the back of the key fob off. The battery will be located inside the key fob.
3. Use your fingernail or a small tool to remove the old battery. Be careful not to touch the terminals of the new battery with your fingers.
4. Insert the new battery into the key fob, making sure that the positive terminal is facing up. The positive terminal is marked with a “+” sign.
5. Replace the back of the key fob and tighten the two screws.
Your Mercedes key fob battery is now changed.
