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

Mercedes-Benz Keys

If you’ve started to notice some issues with your Mercedes-Benz key fob, the battery may be losing its charge. Learn the warning signs your battery is dying, as well as how to replace your Mercedes-Benz key fob battery with Star Motors of Ottawa Mercedes-Benz!

Indicators Your Mercedes-Benz Key Fob Battery is Dying

Keep your eye out for the following warning signs, as they can indicate it’s time to replace your Mercedes-Benz key fob battery: 

  • You’re no longer able to lock or unlock the doors of your Mercedes-Benz using the key fob. Additionally, the panic button no longer works. 
  • Your vehicle has become more difficult to start. Either not starting at all or requiring repeated attempts over a several minute span to finally start. 
  • A dashboard warning sign has appeared that indicates an issue with the charging system. While this can be caused by multiple issues, a quick and easy place to start is changing your Mercedes-Benz key fob battery. 

If you’ve experienced any of the above issues, try changing your Mercedes-Benz key fob battery before seeking service at the Star Motors of Ottawa Mercedes-Benz service centre. If the issues persist, you’ll need a service appointment to explore other possibilities. 

Changing Your Mercedes-Benz Key Fob Battery

Once the time has come to replace the battery in your Mercedes-Benz key fob, you’ll need to follow these simple steps: 

  • Discover Your Key Type: Depending on the model year of your Mercedes-Benz, you’ll either have the older SmartKey® or the newer Chrome SmartKey®. The key type will impact how the batteries will need to be changed and the number of batteries you’ll need. 
  • Purchase the Right Batteries: The older SmartKey® calls for two CR 2025 batteries. The newer Chrome SmartKey® requires the same type of battery, but only needs one.
  • SmartKey® for Older Models: Start the battery replacement by pulling the latch at the end of the key holder and then pushing your key horizontally into the open slot. The last step is to lift the battery out of the compartment and replace it with the fresh ones. 
  • Chrome SmartKey® for Newer Models: Pull the tab at the bottom and then remove the cover by pushing the key into the narrow end of the slot. Once open, replace the battery inside.

Experience the Service Difference at Star Motors of Ottawa Mercedes-Benz

At Star Motors of Ottawa Mercedes-Benz, we not only provide expert service, but we do so at a reasonable price. If you’re curious about Mercedes-Benz service costs, reach out to us today! And if you want to knock some off your next service visit, check out our rotating selection of service specials

More From Star Motors of Ottawa Mercedes-Benz

  • 2020 Mercedes-Benz GLS Price

    Ready to make a luxurious upgrade to your driving experience in Nepean-Barrhaven? You’d be remiss not to check out the 2020 Mercedes-Benz GLS at Star Motors of Ottawa Mercedes-Benz! With two well-appointed trim levels available to meet the unique expectations of Ottawa families, this full-size SUV is sure to impress. How will the new GLS fit into your budget?…

  • The All-New Mercedes-Benz GLB SUV

    Looking for a superb SUV with a spacious interior, sporty performance, and loads of style? The all-new Mercedes-Benz GLB is the perfect choice for the Nepean-Barrhaven and Stittsville-Kanata area. Not only is this SUV packed with practical features for your busy life, but it’s also outfitted with all the luxury features that make Mercedes-Benz such…

  • What is Mercedes-Me

    Powered with mbrace®, Mercedes me stores a variety of information and features in an easily accessible app. Using the Mercedes me app, you can connect to a variety of features on your new or certified pre-owned Mercedes-Benz via your smartphone, laptop, tablet, or other iOS or Android device. Explore the Mercedes me perks and packages…

Saved Vehicles


You don't have any saved vehicles!

Look for this link on your favorites:


Once you've saved some vehicles, you can view them here at any time.

Contact Us

(613) 737-7827

Call Now

400 W Hunt Club Rd • Ottawa, ON K2E 1B2

Get Directions

Today's Hours:

Open Today! Sales: 8:30am-5pm

Open Today! Service: 7am-5pm

Open Today! Parts: 7:30am-5pm

Star Motors of Ottawa Mercedes-Benz 45.335831, -75.720606.