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How to Change the Battery in a Mercedes-Benz Key

Mercedes-Benz key fob with black banner
Your Mercedes-Benz key fob enables you to lock, unlock, and even start your new vehicle seamlessly. However, if you notice that some of its features aren’t working, then it may be time to search for a Mercedes-Benz key fob battery replacement and change out the current battery, so you can continue to have peace of mind. Learn more about how to change the battery in a Mercedes-Benz key fob with the help of the automotive experts at Mercedes-Benz of Portland near Wilsonville.



When to Replace a Mercedes-Benz Key Fob Battery

There are several warning signs Beaverton drivers can keep an eye out for so they’ll know if they need a Mercedes-Benz key fob replacement. Taking notice of any of these issues will quickly enable you to recognize that it’s time to change the battery in your Mercedes-Benz key fob, as well as spot other problems that can be addressed before they get worse. Initial warnings can include:

  • You may notice your vehicle becomes more difficult to start. If it takes several minutes or multiple attempts, that can be an indicator of a low battery.
  • If you lose the ability to lock and unlock your doors or set off the panic alarm that can also be a sign your battery is on the way out.
  • If you notice a warning sign on your dashboard that indicates an issue with the charging system, that can mean you are losing battery power in your key fob.

How to Replace Your Mercedes-Benz Key Fob Battery

Once you have a replacement ready and it’s time to change the battery in your Mercedes-Benz key fob, follow these simple steps to get your vehicle back on the road:

  • Determine Your Key Type: Whether you have a newer Chrome SmartKey® or an older SmartKey®, the key type will impact how the batteries will need to be changed.
  • Get the Right Batteries: The newer Chrome SmartKey® calls for one CR 2025 battery while the older SmartKey® calls for two.
  • SmartKey® for Older Models: To replace the battery in your key fob, pull 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® for Newer Models: 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.

Find a Mercedes-Benz Key Fob Battery at Mercedes-Benz of Portland

Now that you know how to replace the battery in a Mercedes-Benz key fob, you can count on Mercedes-Benz of Portland to have everything you need to keep your luxury vehicle operating at its best on Vancouver roads. Explore our dedicated service department to stay on top of your Mercedes-Benz service costs and maintenance schedule, or turn to our parts center for all of your genuine OEM parts and accessories. Contact us today for more information on our service discounts and to schedule an appointment with our service center at our dealership in Portland!

Mercedes-Benz of Portland 45.511462, -122.676529.