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

Mercedes Benz Logo Closeup

Is your Mercedes-Benz key fob battery starting to run down? Fortunately, replacing it yourself is simple. The Mercedes-Benz of Bedford team hope we can make it a breeze with this simple guide on how to change a Mercedes-Benz key fob battery. We’ve also listed warning signs that tell you your key battery is reaching the end of its life.

Signs Your Mercedes-Benz Key Fob Battery Needs Replacement

Look for these key warning signs that indicate it’s about time to change the battery in your Mercedes-Benz key fob:

  • You notice your vehicle is becoming more difficult to start. If it takes several minutes or multiple attempts, the reason can be a dying key fob battery.
  • Doors won’t lock and unlock with the key fob. The panic alarm not working when you press the button on the key fob is another possible sign your battery is on its way out.
  • A warning light on your dashboard indicates a charging system issue. A low key fob battery can trigger this alert.

If you notice any of these warning signs, be proactive and change the battery before it runs out of power. In the next section, we’ll go over which new batteries to buy and how to change the battery in a Mercedes-Benz key fob.

How to Replace Your Mercedes-Benz Key Fob Battery

Now that you know for sure it’s time to replace your key fob battery, do the following to prepare:

  • Determine Your Key Type — Cleveland Mercedes-Benz drivers may have either a Chrome Key or a Smart Key. You’ll follow slightly different steps when it comes to changing the battery on either type.
  • Buy the Right Batteries — For a Smart Key, you need two CR 2025 batteries. The newer Chrome Key only needs one CR 2025.

Depending on whether you have a Smart Key or a Chrome Key, follow these steps to change the battery: Smart Key

  1. Pull the latch at the end of the key holder.
  2. Insert your key horizontally into the open slot.
  3. Lift out the battery compartment and replace the batteries.

Chrome Key

  1. Pull on the tab at the bottom.
  2. Push your key into the narrow end of the slot to remove the cover.
  3. Replace the battery.

Get the Help You Need at Mercedes-Benz of Bedford

Mayfield and Beachwood drivers trust the expert technicians at Mercedes-Benz of Bedford when it comes to reasonable Mercedes-Benz service costs, oil changes and other routine maintenance, and important service checklists Mercedes-Benz Service A and Service B. We’re proud to offer Bedford-area drivers a selection of service specials!

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