How to Change isun Manufacturer Mercedes Key Battery with LCD Smart Car Key

Changing the battery in your Mercedes key battery ensures that your LCD smart car key functions reliably. A dead battery can leave you stranded. Regular maintenance of your car key prevents such issues. Different types of Mercedes key fobs exist, including the Chrome SmartKey® and older models. Each type requires specific steps for battery replacement. This guide will help you navigate through the process efficiently, whether you have an isun or another type of LCD smart car key.

Tools and Materials Needed

To change the battery in your isun LCD smart car key, gather the necessary tools and materials. Proper preparation ensures a smooth process.

List of Tools

Screwdriver

A small screwdriver helps open the key fob. Ensure the screwdriver fits the screws on your car key.

Replacement Battery

Keep a replacement battery ready. This prevents delays during the process.

Small Pry Tool

A small pry tool assists in opening the key fob without damaging it. Use a plastic pry tool to avoid scratches.

List of Materials

New Battery (CR2025 or CR2032)

Most LCD smart car keys use CR2025 or CR2032 batteries. Check your key fob's specifications before purchasing.

Clean Cloth

A clean cloth helps keep the battery compartment free of dust and debris. Wipe the area before inserting the new battery.

Step-by-Step Guide to Changing the Battery

Identifying Your Key Fob Type

Chrome SmartKey®

Look at the key fob's exterior. A Chrome SmartKey® has a shiny, metallic finish. The design appears sleek and modern. This type often features a small Mercedes-Benz logo.

Older SmartKey®

An older SmartKey® has a more traditional look. The exterior may appear more plastic than metal. Check for a larger Mercedes-Benz logo on the front.

Opening the Key Fob

Using the Screwdriver

Locate the screws on the key fob. Use a small screwdriver to remove these screws. Turn the screwdriver counterclockwise to loosen each screw. Place the screws in a safe spot to avoid losing them.

Using the Pry Tool

Insert a small pry tool into the seam of the key fob. Gently twist the tool to open the fob. Avoid using excessive force to prevent damage. A plastic pry tool works best to avoid scratches.

Removing the Old Battery

Locating the Battery Compartment

Find the battery compartment inside the key fob. The compartment usually sits near the center. Look for a small, circular area that holds the battery.

Carefully Removing the Battery

Use the pry tool or a small screwdriver to lift the old battery. Gently remove the battery from the compartment. Avoid touching the battery contacts to keep them clean.

Inserting the New Battery

Correct Battery Orientation

Place the new battery in the compartment. Ensure the positive side faces up. Check the markings inside the compartment for guidance. Incorrect orientation can prevent the LCD smart car key from working.

Securing the Battery in Place

Press the battery down gently. Make sure the battery sits flat in the compartment. Secure the battery by pressing until it clicks into place. A loose battery can cause the Mercedes key battery to malfunction.

Reassembling the Key Fob

Aligning the Key Fob Halves

Align the two halves of the key fob. Match the edges carefully. Misalignment can make the car key difficult to close. Ensure all internal components stay in their correct positions.

Snapping or Screwing the Fob Back Together

Snap the key fob halves together. Use a screwdriver if screws are present. Tighten the screws securely. Avoid over-tightening to prevent damage. Test the isun key fob to ensure it closes properly.

Troubleshooting Tips

Key Fob Not Working After Battery Replacement

Check the battery orientation first. Ensure the positive side faces up. Verify the battery makes proper contact with the terminals. Clean the contacts if necessary. Dust or debris can interfere with the connection.

Re-syncing the Key Fob

Follow the re-sync procedure in the manual. Insert the key into the ignition. Turn the key to position two. Press any button on the key fob. Hold the button for a few seconds. Remove the key and test the LCD smart car key. Seek professional help if the key fob still does not work.

Troubleshooting Tips

Key Fob Not Working After Battery Replacement

Checking Battery Orientation

Ensure the positive side of the battery faces up. Look for the "+" symbol on the battery and the compartment. Incorrect orientation can prevent the key fob from functioning.

Ensuring Proper Contact

Verify the battery makes contact with the terminals. Clean the contacts with a clean cloth if dust or debris is present. A proper connection ensures the key fob works correctly.

Re-syncing the Key Fob

Steps to Re-sync

Follow the re-sync procedure in the manual. Insert the key into the ignition. Turn the key to position two. Press any button on the key fob. Hold the button for a few seconds. Remove the key and test the key fob.

When to Seek Professional Help

Seek professional help if the key fob still does not work. Persistent issues may indicate a deeper problem. Auto locksmiths have the necessary equipment to diagnose and fix the issue.

Additional Tips and Recommendations

Battery Maintenance Tips

Regularly Check Battery Life

Monitor the battery life of your Mercedes key fob. Replace the battery when you notice a decrease in range or response time. Regular checks prevent unexpected failures.

Avoid Extreme Temperatures

Store your key fob in a moderate environment. Extreme heat or cold can reduce battery life. Avoid leaving the key fob in direct sunlight or freezing conditions.

When to Seek Professional Help

Persistent Issues

Consult a professional if the key fob continues to malfunction after battery replacement. Persistent issues may indicate internal damage or software problems. An expert can diagnose and fix the problem efficiently.

Damaged Key Fob

Seek professional assistance if the key fob appears damaged. Cracks, water damage, or broken buttons can affect functionality. A professional can repair or replace the key fob to ensure reliable performance.

Changing the battery in your Mercedes key fob involves several key steps. First, gather the necessary tools and materials. Next, identify your key fob type and open it carefully. Remove the old battery and insert the new one with the correct orientation. Reassemble the key fob and test its functionality.

Feel free to share your experiences or ask questions in the comments section. Regularly check your key fob's battery life and avoid extreme temperatures. If issues persist, seek professional help to ensure your key fob works reliably.

See Also

Tips for Replacing Your Car Key with iSun Manufacturer's Smart Key

Reasons to Select ISUN for LCD Smart Car Keys and Mercedes Key Battery

iSun Manufacturer Key Fob Replacement for Smart Car Key

Misplaced Your Car Keys? Test Isun Manufacturer's Smart Keys

Top LCD Smart Car Key Programming with ISUN Manufacturer