How to Open Your 2011 Mercedes-Benz E500 Key Fob and Change Battery

How to Open Your 2011 Mercedes-Benz E500 Key Fob and Change Battery

If your Mercedes-Benz keyless entry remote is no longer open doors properly, the battery surely must to be replaced. In this case, you will benefit from knowing how to disassembly your key fob and replace a weak battery DIY. If you gonna solve to do it at home near E500, follow our instruction, but first make sure you have tools and materials required before you start.

What kind of battery key fob require

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

Simple steps to change the battery in your car's keyless entry remote

Inside of your key fob installed coin cell battery. Remove any internal key before you try to pry apart the keyless entry remote.

Delicately try to pry apart your key with hands or flat head screwdriver. Change 2 CR2025 batteries with flat head screwdriver.

Now it's time to install new batteries inside fob’s shell. Every battery has a negative and positive side and if you put the wrong connector down, the current cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.

Before assembling keyless entry fob's case, check that everything is functioning by pressing buttons on circuit board.

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. If your remote key fob case firmly closed, we done. If not, repeat the last step.

Video of key opening

SOLVED - Mercedes Benz Keyfob Battery Replacement | Smart Key Fob Dead Batteries

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz E500 require 2xCR2025 batteries. Most CR2025 batteries are under $5 build upon the brand, size packaging and type you buy. You can take old battery to the store, to find a proper replacement.

Keyless entry remote in most of cases reprogramming not required after battery replace. If your keyless entry remote not working, recheck new battery voltage. If it is not help, read user's manual or contact local dealer.

Yes, you can change battery in your 2011 Mercedes-Benz E500 key fob yourself. Most difficult part is to disassembly keyless entry fob's case. It's pretty simple with our guide.

Auto repair shop's cost for change the battery in key fob is $50-600 depending on the car.

You should replace batteries inside remote key fob of modern cars at least every three years. The lifetime of battery vary on their amount of use, operating conditions and quality.

These symptoms will warn you that it's possible time to change battery in your Mercedes-Benz E500: key fob buttons not working, low key battery indicator on dashboard, you didn't change battery more than 4 years and multiple clicks to unlock or lock doors required.
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Fob Compatibility:

  1. FCC ID: IYZ3317
  2. Models: 2007-2012 Mercedes-Benz E500