How to Change the Battery in Your Mercedes-Benz Key Fob

Thumb on keyless wireless door opener

Have the sinking feeling your Mercedes-Benz key fob battery is not long for this world? Changing the battery is an easy process; you just need to make sure you know which key fob you have and purchase the right batteries. Today, Mercedes-Benz of Newton will teach you the warning signs to look for in a dying battery and the steps to replace it yourself. 

Signs a Mercedes-Benz Key Fob Battery Needs Replacement

If you notice the following signs or issues, it’s time to consider a Mercedes-Benz key fob battery replacement: 

  • It takes multiple attempts or several minutes to start your vehicle
  • You lose the ability to lock and unlock your doors 
  • You can no longer set off the panic alarm 
  • A warning sign on your dashboard indicates there’s an issue with the charging system

To prevent further complications on the Hackettstown roads, you’ll want to change your Mercedes-Benz key fob battery when you notice any of the above signs. 

Steps to Replace Your Mercedes-Benz Key Fob Battery

Follow the steps below to change your Mercedes-Benz key fob battery and get back behind the wheel in no time:

  • Identify Your Key Type: Your vehicle with either have a newer Chrome SmartKey® or an older SmartKey®. Your key type dictates how the batteries will need to be changed. 
  • Purchase the Right Batteries: For the newer Chrome SmartKey®, you’ll need one CR 2025 battery. You’ll need two of these batteries for the older SmartKey®.
  • SmartKey®: Start by pulling the latch at the end of the key holder, push your key horizontally into the open slot, and then lift the battery out of the compartment. 
  • Chrome SmartKey®: Pull the tab at the bottom, remove the cover by pushing the key into the narrow end of the slot. Then, place the battery inside.

Learn More About Mercedes-Benz Service Costs at Mercedes-Benz of Newton

From changing your Mercedes-Benz key fob to teaching you how to take care of your tires, Mercedes-Benz of Newton’s service center is here to help. Contact us with your Mercedes-Benz service questions or stop by if you run into trouble when changing your battery. 

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(877) 870-6109

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92 Hampton House Rd • Newton, NJ 07860

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Open Today! Sales: 9am-8pm

Open Today! Service: 7:30am-6pm

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Mercedes-Benz of Newton 41.0792303, -74.736367.