2012 Mercedes-Benz E250 Key Fob Battery Replacement Instructions

2012 Mercedes-Benz E250 Key Fob Battery Replacement Instructions

If your E250 remote key fob is no longer unlock doors properly, the cell battery likely must to be replaced. It's not difficult to change the battery in your key fob, and it’s easier than you think. All you need is outlined in this post.

What type battery does 2012 Mercedes-Benz E250 key fob take

Changing batteries in remote key fob require 2xCR2025 batteries and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the type of your fob’s batteries.
  • flat head screwdriver
  • 2xCR2025 batteries

Step by step instruction

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

Carefully try to disassemble your key fob with pry tools. Remove two CR2025 batteries with flat head screwdriver.

Now it's time to install new batteries in fob’s case. Be sure to connect the battery the right way around in a circuit. Your remote key fob will not work if you put battery wrong way.

When the new batteries installed, verify keyless entry remote by pressing buttons. If all functions works, assemble your keyless entry fob's case in reverse order.

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

Video of key disassembly

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

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz E250 require 2xCR2025 batteries. Price for CR2025 batteries are under $6 depending on the type, brand and size packaging you buy. Take your old battery to the store, to be sure.

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

Yes, you can replace battery in your 2012 Mercedes-Benz E250 remote key fob yourself. Most hard part is to disassembly keyless entry fob's case. It's pretty simple with our instruction.

Auto repair shop's cost for replace the battery in keyless entry remote is $50-600 depending on the make.

You should replace batteries inside key fob of modern cars at least once in 3-4 years. The term of battery differ on frequency of use, quality and operating conditions.

These signs will warning you that it's probably time to change battery in your 2012 Mercedes-Benz E250: you didn't change battery more than 4 years, key fob buttons not working, signal strength reduced and multiple clicks to unlock or lock doors required.
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Other Mercedes-Benz Models:

Fob Compatibility:

  1. FCC ID: IYZ3317
  2. Models: 2011-2012 Mercedes-Benz E250