How to Replace the Battery in a 1999 Mercedes-Benz E320 Key Fob

How to Replace the Battery in a 1999 Mercedes-Benz E320 Key Fob

Key fob allow access to your car. Once the key fob battery is weak or dead you’ll lose your fob’s ability to use remote opportunities. It's not difficult to change the battery in your keyless entry remote DIY. All tools, that you need is described in this article.

What size battery does 1999 Mercedes-Benz E320 key fob required

Changing batteries in remote key fob require two CR2025 batteries and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the size of your keyless entry fob's batteries.
  • flat head screwdriver
  • 2xCR2025 batteries

Simple steps to change the battery in your E320's remote key fob

Inside of your keyless entry remote installed tiny coin cell battery. Move the key out of the way if it is in the keyless entry remote.

Accurately try to disassemble your fob with hands or flat head screwdriver. Remove two CR2025 batteries with flat head screwdriver.

Now it's time to install new batteries inside keyless entry fob's body. Be sure to connect the battery the right way around in a circuit. Your remote key fob will not work if you place battery wrong way.

After the new batteries installed, check key fob by pressing buttons. If everything working good, assemble your fob’s body in reverse order.

The last thing to do is put your cover back on fob. Gently try to assemble the two halves together by hands from top to bottom. Inspect your keyless entry remote shell for gaps. If it is not tightly closed try to repeat last step.

Key Fob Battery Replacement 1999 Mercedes-Benz E320 Video

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Still not working? Buy new one


Keyless entry remote of Mercedes-Benz E320 use 2xCR2025 batteries. Most CR2025 batteries are under $4 depending on the brand, size packaging and type you buy. You can take old battery to the store, with you to find a proper replacement.

Usually, after remote key fob battery replace, you do not need to reprogram. Keyless entry remote reprogramming procedure often described in user's manual of your vehicle.

Replacing your remote key fob battery is easy to do in 1999 Mercedes-Benz E320. Most of car manufacturers think of the customers and make a special hole for keyless entry remote disassembly.

The cost to replace the battery in key is from $30 to as high as $500 depending on the make and the service pricing.

You should change batteries inside key fob of modern cars at least every three or four years. The lifetime of battery vary on usage time, operating conditions and quality.

If your Mercedes-Benz fob's battery more than 4 years old, key fob buttons not working, has low key battery indicator on dashboard or need multiple clicks to unlock or lock doors, in most cases battery change in key fob needed. Currently installed battery is dead or weak with a high probability, but if it's not help to fix issues, remote key fob replace or repair required.
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Other Mercedes-Benz Models:

Fob Compatibility:

  2. Models: 1998-2006 Mercedes-Benz E320