How to Open Your 2009 Mercedes-Benz E500 Key Fob and Change Battery

How to Open Your 2009 Mercedes-Benz E500 Key Fob and Change Battery

If your car key fob is no longer unlock doors correct, the cell battery most likely needs to be replaced. In this article, we explained how to open your key fob and replace a weak or dead battery DIY. If you gonna solve to do it at home near E500, follow our instruction, but don't forget to check everything you need.

What kind of battery keyless entry remote use

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

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

A tiny coin cell battery installed in the your remote key fob. Move the key out of the way if it is in the remote key fob.

Carefully try to disassemble your keyless entry remote with pry tools. Change two CR2025 batteries with flat head screwdriver.

Replace old batteries with new one CR2025. Battery must be placed with the same position as was a previous. Your keyless entry remote will not work if you mistakenly place battery wrong way.

When the new batteries installed, check key fob by pressing buttons. If all functions works, assemble your fob’s shell in reverse order.

The last thing to do is put your cover back on fob. Accurately try to put the two halves in place by hands from top to bottom. Check your keyless entry remote case for gaps. If it is not tightly closed try to repeat last step.

Video of keyless entry remote opening

▶️HOW TO Mercedes Benz KeyFob Battery Replacement 2003 2004 2005 2009 2010 2012 ▶️ Ultimate Guide

Still not working? Buy new one

Frequently Asked Questions

Key fob of Mercedes-Benz E500 use 2xCR2025 batteries. Price for CR2025 batteries are under $6 build upon the size packaging, brand and type you buy. You can take old battery to the store, with you to find a proper replacement.

Usually, after key fob 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 2009 Mercedes-Benz E500 remote key fob yourself. Most hard part is to disassembly fob’s case. It's pretty easy with our instruction.

The price to replace the battery in key is $50-600 depending on the make and the service pricing.

You should replace batteries inside remote key fob of Mercedes-Benz E500 at least once in three or four years. The term of battery differ on their amount of use, operating conditions and quality.

These signs will warning you that it's probably time to replace battery in your 2009 Mercedes-Benz E500: low key battery indicator on dashboard, signal strength reduced, you didn't change battery more than 4 years and key fob buttons not working.
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Other Mercedes-Benz Models:

Fob Compatibility:

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