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

Having issues with your Mercedes-Benz key fob? The culprit may be a dying battery. Thankfully, the professionals at our San Diego-area Mercedes-Benz service center are here to help! We’ll cover some warning signs to look for, then tell you how to change the battery in your Mercedes-Benz key fob.

Signs Your Mercedes-Benz Key Fob Battery Requires Replacement

There are multiple warning signs to watch out for if you suspect your Mercedes-Benz key fob battery is on its way out. Learn more, here:

• Have you had any difficulty getting your vehicle to start recently? If it takes several attempts to successfully start, it may be a symptom of a low key fob battery.
• If you’re no longer able to lock/unlock your doors or activate the panic alarm, this might also signal a low battery.
• If your dashboard is illuminating the warning sign for a charging system issue, it may mean you’re losing battery power in your key fob.

If one or more of these warning signs are familiar to you, you’ll want to change the battery in your Mercedes-Benz key fob to help prevent future issues while you’re navigating Escondido. You’ll find detailed steps on how to do this in the next section.

How to Change the Mercedes-Benz Key Fob Battery

The steps for changing the battery in your Mercedes-Benz key fob are simple and easy to follow along with at home in San Marcos:

• Determine Your Key Fob Classification: Whether you’re using a more recent Chrome SmartKey® or an older version SmartKey® will determine how the batteries need to be changed.
• Find the Proper Batteries: The Chrome SmartKey® requires one CR 2025 battery, and the older SmartKey® requires two CR 2025 batteries.
• New Model Chrome SmartKey®: Pull the tab at the bottom of the fob and remove the cover by pushing the key into the skinnier end of the slot. Then, carefully place the battery inside and replace the cover.
• Older Model SmartKey®: Pull the latch at the end of your key holder, then push your key sideways into the open slot, lifting the old batteries out. Insert two new batteries, then replace the key holder.

Unsure whether you have a newer Chrome SmartKey® or an older SmartKey®? The new Chrome SmartKey® has a metal casing, while the older SmartKey® typically uses a black plastic casing.

Request a Mercedes-Benz Service Cost Estimate at Mercedes-Benz of Escondido

Having trouble replacing your Mercedes-Benz key fob battery on your own? We invite you to schedule an appointment with our service center. Contact us ahead of time with questions or to request a Mercedes-Benz service cost estimate, and be sure to check out our service specials! For even more helpful service tips and tricks, check out our online service info hub.