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

Is the battery in your new Mercedes-Benz key fob coming to the end of its life? Learn the warning signs that a new battery for your Mercedes-Benz key fob is needed and how to replace it with our guide below!

How Do I Know My Mercedes-Benz Key Fob Battery Needs a Replacement?

There are several warning signs to take note of that can indicate your Mercedes-Benz key fob battery is losing power. Initial warnings can include:

• You may have a harder time starting your vehicle. If it takes multiple attempts or a few minutes, it’s time for a new battery.
• If can’t lock and unlock your doors or set off your panic alarm.
• If you notice a warning sign on your dashboard that indicates an issue with the charging system, you may be losing battery power in your key fob.

Are you experiencing any of these issues? Changing the Mercedes-Benz key battery before it dies completely is important.

How to Replace Your Mercedes-Benz Key Fob Battery

When you need to change the battery for your Mercedes-Benz key fob, there are just a few steps to follow:

• Determine Your Key Type: You could have either a Chrome Key or Smart Key. Your key type impacts how you change the battery.
• Get the Right Batteries: The newer Chrome Key only needs one CR 2025 battery, and the older Smart Key needs two.
• Smart Key: For the Smart Key pull the latch at the end of the key holder, stick your key horizontally into the open slot, and lift the battery compartment out to replace the batteries.
• Chrome Key: When changing a Chrome Key battery, pull on the tab at the bottom, push the key into the narrow end of the slot to remove the cover, and replace the battery.

If you’re having any issues, feel free to schedule an appointment at our Mercedes-Benz of St. Louis service center, and one of our certified service technicians can replace it for you in a flash.

Explore Mercedes-Benz Service Costs at Mercedes-Benz of St. Louis

Have additional questions about changing your Mercedes-Benz key battery, or are you having issues with your recently replaced battery? The specialized team at the Mercedes-Benz of St. Louis service center can help you with your Mercedes-Benz service needs at a reasonable price. Contact us with any questions, and be sure to check out our service specials before booking your appointment.