1. Gather the necessary tools and materials:
- A small flathead screwdriver or pry tool
- A new CR2025 battery
2. Locate the keyless remote:
- The keyless remote is usually attached to your car keys.
- It may be a separate device or integrated into your car key.
3. Open the keyless remote:
- Use the flathead screwdriver or pry tool to gently pry open the keyless remote.
- Be careful not to damage the remote or its components.
4. Remove the old battery:
- Once the keyless remote is open, you should see the old battery.
- Use your fingers or a small tool to gently remove the old battery from its compartment.
5. Insert the new battery:
- Take the new CR2025 battery and insert it into the battery compartment.
- Make sure the battery is facing the correct way, with the positive side facing up.
6. Close the keyless remote:
- Once the new battery is inserted, carefully close the keyless remote.
- Make sure the remote is securely closed and that there are no gaps.
7. Test the keyless remote:
- Press one of the buttons on the keyless remote to make sure it is working properly.
- If the remote is not working, double-check that the battery is inserted correctly and that the remote is closed properly.
8. Dispose of the old battery safely:
- Remember to dispose of the old battery properly by recycling it at an appropriate recycling center.
9. Reattach the keyless remote to your car keys or key ring:
- If the keyless remote was separate from your car keys, reattach it securely.
- Make sure it is easily accessible when you need to use it.
By following these steps, you can successfully change the battery in the keyless remote of your 1999 E320 Mercedes-Benz.