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

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Is your Mercedes-Benz key fob battery on the way out? Mercedes-Benz of Beaverton will show you how to change the battery and restore full function to your key fob! Review our quick guide to see the steps and batteries needed for your key fob model.

Signs Your Mercedes-Benz Key Fob Battery Needs To Be Replaced

When it comes to your Mercedes-Benz key fob battery, there are several signs to look for that can indicate you’re in need of a new battery. Some top warning signs include:


  • You’re having problems starting your vehicle, or find it takes multiple attempts
  • You’ve lost the ability to lock or unlock doors, or can no longer trigger the panic alarm
  • A warning sign on your dashboard indicates an issue with the charging system


If you start seeing or experiencing any of these issues, make sure you take the needed steps to replace you Mercedes-Benz key fob battery. Otherwise, you could run into more problems while making your way through Portland.

Replace Your Mercedes-Benz Key Fob Battery

If you’re wondering how to change your battery, the process is actually simple. Follow the steps below to get back on the West Linn roads:

  • Determine Your Key Type: You’ll either have a newer Chrome SmartKey® or an older SmartKey®, and the type of key you have will impact how the batteries will need to be changed.
  • Get the Right Batteries: You’ll need one CR 2025 battery for the newer Chrome Key, while the older SmartKey® calls for two.
  • SmartKey®: To change 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®: 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.

Discover Mercedes-Benz Service Costs in Portland

If you find yourself struggling and in need of help with changing your Mercedes-Benz key fob battery, reach out to the Mercedes-Benz of Beaverton service center. Our technicians can quickly handle the task for you, and answer any questions you have about Mercedes-Benz service costs and our service specials.

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