How to Open Your 2008 Mercedes-Benz CLS550 Key Fob & Change Battery

How to Open Your 2008 Mercedes-Benz CLS550 Key Fob & Change Battery

Remote key fob grant easy access to your car. When the remote key fob battery is discharged you lose your keyless entry fob's ability to control distance opportunities. Yes, it is possible to replace the battery in your key fob, and it’s easier than you think. All you need is described below.

What kind of battery key fob require

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

Step by step instruction

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

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

Change old batteries with fresh one CR2025. Battery must be installed with the same polarity as was a previous. Your remote key fob will not work if you by mistake put battery wrong way.

Before assembling fob’s case, check that all functions works by testing buttons on circuit board.

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

How to change the battery video instruction

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 CLS550 use 2xCR2025 batteries. Most CR2025 batteries are under $4-6 build upon the type, size packaging and brand you buy. Take your old battery to the store, to find a proper replacement.

Usually, after key battery change, you do not need to reprogram. Key fob reprogramming procedure often described in user's manual of your vehicle.

Yes, you can change battery in your 2008 Mercedes-Benz CLS550 remote key fob yourself. Most difficult part is to open fob’s case. It's pretty easy with our step by step guide.

The cost to change the battery in remote key fob is from $30 to as high as $500 depending on the brand and the service pricing.

Keyless entry remote batteries in Mercedes-Benz CLS550 should be changed once in 4 years, although this will differ based on frequency of use and quality. If your keyless entry remote reduced signal strength, you should change batteries before it stop working and make trouble for you.

These symptoms will warning you that it's probably time to replace battery in your 2008 Mercedes-Benz CLS550: you didn't change battery more than 4 years, signal strength reduced, key fob buttons not working and multiple clicks to unlock or lock doors required.
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Fob Compatibility:

  1. FCC ID: KR55WK49031
  2. Models: 2007-2008 Mercedes-Benz CLS550