How to Replace the Battery in a 2006 Mercedes-Benz C300 Key Fob

How to Replace the Battery in a 2006 Mercedes-Benz C300 Key Fob

Key fob grant access to your car. When the key battery is weak or dead you will lose your fob’s ability to control distance opening function. In this post, we described how to disassembly your car keyless entry remote and replace your Mercedes-Benz key battery.

What size battery does 2006 Mercedes-Benz C300 key fob required

Before going to open remote key fob check all that you need: 2 CR2025 batteries and flat head screwdriver.
  • flat head screwdriver
  • 2xCR2025 batteries

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

Inside of your keyless entry remote installed button battery. Remove any internal key first, and then try to pry apart the remote key fob.

Carefully try to disassemble your key fob with hands or flat head screwdriver. Replace 2 CR2025 batteries with flat head screwdriver.

Get new batteries and install it in 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.

Before assembling fob’s case, check that all functions works by pressing buttons on key fob.

At this point squeeze keyless entry fob's back cover together. Line your body pieces together and put it together by hands from top to bottom. Check your remote key fob body for gaps. If it is not tightly closed try to repeat last step.

Key Fob Battery Replacement 2006 Mercedes-Benz C300 Video

Mercedes Benz Key Fob Battery Change - How To DIY Learning Tutorials

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz C300 require 2xCR2025 batteries. Price for CR2025 batteries are under $6 depending on the brand, type and size packaging you buy. Take your old battery to the store, to find a proper replacement.

Usually, after key battery replace, reprogramming not required. Don't be scare of this procedure, because often it's described in user's manual.

Yes, you can change battery in your 2006 Mercedes-Benz C300 remote key fob yourself. Most hard part is to open fob’s case. It's pretty simple with our step by step guide.

Auto repair shop's pricing for change the battery in keyless entry remote is from 50 to 600 dollars depending on the make.

Remote key fob batteries in modern cars should be changed once in three or four years, but this will vary based on usage and build quality. If your key fob reduced signal strength, you should replace batteries before it stop close doors and make problems for you.

These signs will warning you that it's possible time to change battery in your Mercedes-Benz C300: key fob buttons not working, you didn't change battery more than 4 years, signal strength reduced and multiple clicks to unlock or lock doors required.
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Fob Compatibility:

  1. FCC ID: KR55WK49031
  2. Models: 2006-2009 Mercedes-Benz C300