How to Change the Battery in a Mercedes-Benz Key

Key Fob

Wondering how to change a battery in your Mercedes-Benz key fob? You can trust the experts at our service center to help you get your Mercedes-Benz key fob battery repaired. Let’s take a look at some of the warning signs you can watch for to identify dying key fob battery. Then, we’ll go over the process of how to replace it in short order! If you have any questions about Mercedes-Benz service costs or other elements of the process, don’t hesitate to let us know.

When to Replace Your Mercedes-Benz Key Fob Battery

In most cases, drivers notice that their Mercedes-Benz key fob battery is beginning to expire when the key stops functioning as a proximity remote. In these cases, it may continue to allow you to start the vehicle, but don’t wait to act!

There are a few signs you can look out for when you feel it may be time to replace your Mercedes-Benz key fob battery, including:

  • Your vehicle may become more difficult to start up. If it takes multiple attempts or several minutes, that could indicate a low battery.
  • If you’re no longer able to lock and unlock your doors or activate the panic alarm, this is an indication that your battery may be getting weaker.
  • If you see a dashboard warning sign indicating a charging system issue, this suggests that you are losing key fob battery power.

If you notice any of these signs, it’s time to replace your Mercedes-Benz key fob battery to prevent further issues while driving around Centerville or South Riding.

Replacing Your Mercedes-Benz Key Fob Battery

As you’re replacing your Mercedes-Benz key fob battery, there are factors, like key type, that you’ll want to take into account. Naturally, different keys require different replacement methods. In the event that you need assistance, the type of fob may also have an impact on your Mercedes-Benz service costs.  With that said, it’s pretty easy to replace your Mercedes-Benz key fob battery at home. Here’s what you need to know:

  • Find Out Your Key Type: The type of key you have, such as a newer Chrome SmartKey® or an older SmartKey®, will affect how the batteries are changed.
  • Select the Right Batteries: The older SmartKey® requires two CR 2025 batteries, while the newer Chrome SmartKey® needs one CR 2025 battery.
  • Older SmartKey® Models: To replace your Mercedes-Benz key fob battery, tug the latch at the end of the key holder, locate the open slot and push your key in horizontally, and then lift the battery from the compartment.
  • Newer Chrome SmartKey® Models: Pull the bottom tab, push the key into the slot’s narrow end to remove the cover, and then place the battery within.

How Long Does a Key Fob Battery Last?

In most cases, a key fob battery should last for at least three to four years. However, some key fob batteries may last for up to ten years before they need to be replaced. Then, in other cases, the battery may wear out more quickly. If you want to make sure that your Mercedes-Benz key fob battery lasts as long as possible, keep these tips in mind:

  • Keep your battery in a location where it’s neither too cold nor too hot. Like all batteries, key fob batteries can be sensitive to changes in temperature.
  • All key fobs communicate with their vehicles in a passive way whenever they are nearby! So, by keeping your key fob in close proximity to the vehicle, you may be expending its charge more quickly.

For these reasons, we recommend that you take your Mercedes-Benz key fob into your home and keep it in a safe location at night.

How to Order a New Mercedes-Benz Key Fob

If learning how to replace the battery in your Mercedes-Benz key doesn’t solve the issues you’ve been having, it may be time to order a replacement key. We’d be happy to help. For security reasons, key fob replacement orders cannot be handled over the phone in most cases. You’ll need to visit our dealership and bring sufficient proof of ownership. The price of your new key will need to be paid in advance, and if your vehicle was made during or after model-year 2012, then key programming may also be required. Contact us today to learn more about Mercedes-Benz service costs for this issue, or get more information on the process.

Explore Mercedes-Benz Battery Replacement at Mercedes-Benz of Chantilly

Do you need help replacing your Mercedes-Benz key fob battery? Our service center near Ashburn is here to help with all of your service needs at Mercedes-Benz service costs that you can afford. Contact us with any questions you may have, and be sure to take a look at our service specials before you book your appointment.

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