How to Open Your 2008 Mercedes-Benz E300 Key Fob & Change Battery

How to Open Your 2008 Mercedes-Benz E300 Key Fob & Change Battery

If your auto keyless entry remote is no longer unlock doors well, the cell battery likely needs to be changed. It's not complicated to change the battery in your remote key fob with our instruction. All you need is explained in this article.

What type battery keyless entry remote use

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

Step by step instruction

A button battery installed inside the your key fob. Remove any internal key before you try to pry apart the keyless entry remote.

Gently try to open your fob with flat head screwdriver. Replace two CR2025 batteries with flat head screwdriver.

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

Before assembling fob’s case, make sure that all functions works by pressing buttons on circuit board.

At this point squeeze keyless entry fob's back cover together. Line your case two halves together and put it in place by hands from top to bottom. If your fob body firmly closed, we done. If not, repeat the last step.

Key Fob Battery Replacement 2008 Mercedes-Benz E300 Video

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

Still not working? Buy new one

Frequently Asked Questions

Remote key fob of Mercedes-Benz E300 use 2xCR2025 batteries. Most CR2025 batteries are under $4 depending on the type, brand and size packaging you buy. Take your old battery to the store, to find a proper replacement.

Keyless entry remote in most of cases do not require to be reprogrammed after battery change. If your keyless entry remote not working, recheck new battery voltage. Otherwise, read user's manual or contact local dealer.

Changing your key fob battery is easy to do in 2008 Mercedes-Benz E300. Most of car manufacturers think about clients and make a special hole for keyless entry remote disassembly.

Dealer service cost for replace the battery in fob is from $30 to as high as $500 depending on the brand.

You should replace batteries inside remote key fob of modern cars at least once in three or four years. The term of battery differ on usage time, operating conditions and quality.

If your car signal strength reduced, key fob buttons not working, has low key battery indicator on dashboard or fob's battery more than 4 years old, in most cases battery replace in keyless entry remote required. Currently installed battery is dead with a high probability, but if it's not fix, remote key fob replace or repair needed.
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Other Mercedes-Benz Models:

Fob Compatibility:

  1. FCC ID: IYZ3317
  2. Models: 2008-2012 Mercedes-Benz E300