2008 Mercedes-Benz E550 Key Fob Battery Replacement Instructions

2008 Mercedes-Benz E550 Key Fob Battery Replacement Instructions

Keyless entry remote grant access to your Mercedes-Benz. When the key battery is weak or dead you will lose your fob’s ability to use distance opening function. It's not difficult to change the battery in your remote key fob DIY. All you need is explained in this article.

What size battery does 2008 Mercedes-Benz E550 key fob take

Before beginning disassembly keyless entry remote be sure that you have all required tools and materials: CR2025 batteries and flat head screwdriver.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

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

Accurately try to disassemble your key fob with flat head screwdriver. Change CR2025 batteries with flat head screwdriver.

Get new batteries and install it in keyless entry fob's shell. Battery must be installed with the same position as was an old. Your key will not work if you mistakenly put battery wrong way.

When the new batteries installed, verify remote key fob functionality by pressing buttons. If everything is functioning, assemble your keyless entry fob's body in reverse order.

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

How to change the battery video guide

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

Still not working? Buy new one


Remote key fob of Mercedes-Benz E550 use 2xCR2025 batteries. Most CR2025 batteries are under $4 depending on the brand, size packaging and type you buy. Take your old battery to the store, with you to find a proper replacement.

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

Replacing your keyless entry remote battery is simple to do in 2008 Mercedes-Benz E550. Most of car manufacturers think of the customers and make a special hole for remote key fob disassembly.

Dealer service price for replace the battery in key is from $30 to as high as $500 depending on the make.

Key fob batteries in modern cars should be replaced once in 4 years, but this will differ based on their amount of use and quality. If your key fob decreased signal strength, you should change batteries before it stop open doors and make trouble for you.

If your auto need multiple clicks to unlock or lock doors, signal strength reduced, has low key battery indicator on dashboard or key fob buttons not working, in most cases battery replace inside key fob needed. Currently installed battery is weak or dead with a high probability, but if it's not fix, keyless entry remote replace or repair required.
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Fob Compatibility:

  1. FCC ID: IYZ3317
  2. Models: 2007-2012 Mercedes-Benz E550