2009 Mercedes-Benz S500 Key Fob Battery Replacement Guide

2009 Mercedes-Benz S500 Key Fob Battery Replacement Guide

If your car remote key fob is no longer unlock doors well, the battery more likely needs to be changed. In this post, we described how to disassembly your remote key fob and change your Mercedes-Benz key battery step by step.

What type battery remote key fob require

Before beginning open key fob make sure that you have all recommended tools and materials: flat head screwdriver and 2 CR2025 batteries.
  • flat head screwdriver
  • 2xCR2025 batteries

Simple steps to change the battery in your car's remote key fob

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

Accurately try to open your key fob with flat head screwdriver. Replace 2 CR2025 batteries with flat head screwdriver.

Change old batteries with new one CR2025. Every battery has a negative and positive side and if you put the wrong connector down, the current 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 pressing buttons on remote key fob.

The last thing to do is put your cover back on fob. Gently try to assemble the pieces together by hands from top to bottom. If your remote key fob shell tightly closed, we done. If not, repeat the last step.

Key Fob Battery Replacement 2009 Mercedes-Benz S500 Video

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

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz S500 use 2xCR2025 batteries. Price for CR2025 batteries are under $5 build upon the brand, type and size packaging you buy. You can take old battery to the store, with you to find a proper replacement.

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

Yes, you can change battery in your 2009 Mercedes-Benz S500 key fob yourself. Most hard part is to open keyless entry fob's case. It's pretty simple with our guide.

The cost to replace the battery in fob can run anywhere from $30 to as high as $500 depending on the make and the service station.

You should change batteries inside remote key fob of modern cars at least once in 3-4 years. lifespan of battery vary on their amount of use, quality and operating conditions. Lithium cells usually will last longer.

These signs will warn you that it's probably time to change battery in your Mercedes-Benz S500: signal strength reduced, low key battery indicator on dashboard, you didn't change battery more than 4 years and key fob buttons not working.
Be the first to comment.
Your message is required.

Fob Compatibility:

  1. FCC ID: IYZ3317
  2. Models: 2007-2011 Mercedes-Benz S500