How to Open Your 2007 Mercedes-Benz S550 Key Fob & Change Battery

How to Open Your 2007 Mercedes-Benz S550 Key Fob & Change Battery

Key fob grant access to your car. When the key fob battery is weak or dead you’ll not to be able unlock car from distance. In this post, we outlined how to disassembly your remote key fob and change your Mercedes-Benz key battery step by step.

What type battery does 2007 Mercedes-Benz S550 key fob required

Before starting open key fob be sure that you have all required tools and materials: flat head screwdriver and 2 CR2025 batteries.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

A button cell battery installed inside the your keyless entry remote. Move the key out of the way if it is in the keyless entry remote.

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

Replace old batteries with fresh one CR2025. Battery must be installed with the same position as was a previous. Your key will not work if you mistakenly put battery wrong way.

Before assembling fob’s case, make sure that everything is functioning by pressing buttons on key fob.

At this point squeeze fob’s back cover together. Line your body pieces together and assemble it together by hands from top to bottom. Check your key case for gaps. If it is not firmly closed try to repeat last step.

How to replace the battery video guide

Mercedes Key Fob Battery Change Replacement Chrome Key by round panic

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz S550 require 2xCR2025 batteries. Price for CR2025 batteries are under $4-6 depending on the type, size packaging and brand you buy. You can take old battery to the store, to find a proper replacement.

Usually, after remote key fob battery replace, you do not need to reprogram. Don't be scare of this procedure, because often it's described in user's manual.

Replacing your key fob battery is simple to do in 2007 Mercedes-Benz S550. Most of car manufacturers think of the customers and make a special hole for keyless entry remote open.

The cost to change the battery inside key fob can run anywhere from $30 to as high as $500 depending on the make and the service pricing.

Remote key fob batteries in modern cars should be changed every 3-4 years, but this will vary based on usage and battery quality. If your keyless entry remote shortened signal strength, you should change batteries before it stop open doors and make trouble for you.

If your Mercedes-Benz signal strength reduced, has low key battery indicator on dashboard, fob's battery more than 4 years old or key fob buttons not working, in most cases battery change in remote key fob needed. Current battery is discharged with a high probability, but if it's not help, key fob replace or repair needed.
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Fob Compatibility:

  1. FCC ID: IYZ3317
  2. Models: 2007-2012 Mercedes-Benz S550