2005 Mercedes-Benz S430 Key Fob Battery Replacement Guide

2005 Mercedes-Benz S430 Key Fob Battery Replacement Guide

Key fob grant access to your Mercedes-Benz. Once the key fob battery is dead you not to be able lock car from distance. In this post, we walks you through how to open your keyless entry remote and replace your Mercedes-Benz key battery.

What type battery does 2005 Mercedes-Benz S430 remote key fob take

Before starting open keyless entry remote check all that you need: flat head screwdriver and CR2025 batteries.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step guide

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

Gently try to open your fob with pry tools. Remove two CR2025 batteries with flat head screwdriver.

Get new batteries and install it inside fob’s body. Every battery has a negative and positive side and if you put the wrong connector down, the charge cannot go into your circuit board and make it work. Check position on battery, by "+" mark.

Before assembling keyless entry fob's case, verify that all functions works by testing 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. If your key fob shell firmly closed, we done. If not, repeat the last step.

Key Fob Battery Replacement 2005 Mercedes-Benz S430 Video

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

Still not working? Buy new one


Remote key fob of Mercedes-Benz S430 require 2xCR2025 batteries. Most CR2025 batteries are under $5 depending on the type, size packaging and brand you buy. Take your old battery to the store, to be sure.

Often, after remote key fob battery replace, reprogramming not required. Key fob reprogramming procedure often described in user's manual of your vehicle.

Yes, you can change battery in your 2005 Mercedes-Benz S430 key yourself. Most difficult part is to open keyless entry fob's case. It's pretty easy with our instruction.

The price to replace the battery inside fob is from $30 to as high as $500 depending on the car and the service station.

Keyless entry remote batteries in Mercedes-Benz S430 should be replaced once in 3-4 years, also this will vary based on their amount of use and battery quality. If your key fob reduced signal strength, you should replace batteries before it stop close doors and make problems for you.

These symptoms will alert you that it's possible time to replace battery in your Mercedes-Benz S430: key fob buttons not working, low key battery indicator on dashboard, you didn't change battery more than 4 years and signal strength reduced.
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Fob Compatibility:

  2. Models: 1999-2006 Mercedes-Benz S430