If your Mercedes key fob isn’t working like it once did, then it is most likely because the battery is dying and needs to be replaced. If it stopped working, then you need a new battery. You could take the key fob to a Mercedes dealership and have them change it for you, or you could do it yourself. In this article, I’ll go over some things that you should know if you decide to change the battery yourself.

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Change Mercedes Benz Key Fob Battery

If your Mercedes Benz Model matches any of the years below, you should be able to change the key fob battery with the instructions in this article.

• 2007
• 2008
• 2009
• 2010
• 2011
• 2012
• 2013
• 2014
• 2015
• 2016
• 2017
• 2018
• 2019
• 2020
• 2021

 Mercedes Benz Key Fob Type

The batteries that you need will depend on the key fob that you have for your Mercedes. The chrome comes in a metal casing and is only for new Mercedes Benz models. There are also two different types of chrome keys; a new one and an older one. Keep in mind that the old one needs two batteries whereas the new one only needs one battery. You can tell the difference based on what the panic button looks like. The new chrome key fobs have a triangular type panic button, the older key has a circular panic button.

Lastly, there’s also a SmartKey that is for Mercedes Benz models that are older. This particular key is made out of plastic.

How to Open Your Mercedes-Benz Car Key Fob

You should know that opening a chrome key isn’t the same as it is for a SmartKey. However, once you are able to open your key fob, you’ll see that changing the battery is quite easy.

To get started with changing the battery for your Mercedes Benz key fob, you’ll need to pull down the tab that is square-shaped that can be found on the bottom of the key. You should pull it until it is released.

Once the tab has been separated, you should see a small gap in the key fob. You will have to push right into the narrow, flat end of the key fob to get it to open.

After that, you’ll need to remove the previous battery and then replace it with the new battery. Also, make sure that the battery is in the same position as the previous battery.

How To Replace Mercedes Benz Smart Key Battery

Find the latch at the end of the fob and pull on it, the key should come out on its own. Once released, you should see a slot that is at the end of the fob. All you have to do is press the key directly into the slot and that will allow you to open and access the battery compartment. Next, you will need to take out the old battery and insert the one. That’s all you have to do to change the battery for your Mercedes Benz Smart Key.