How to Replace the Battery in a 2004 Mercedes-Benz S500 Key Fob

How to Replace the Battery in a 2004 Mercedes-Benz S500 Key Fob

If your auto key fob is not open doors properly, the battery likely needs to be replaced. In this article, we described how to disassembly your car remote key fob and replace your Mercedes-Benz key battery.

What type battery key fob use

Changing batteries in keyless entry remote require two CR2025 batteries and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the size of your fob’s batteries.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

Inside of your key fob installed coin cell battery. Move the key out of the way if it is in the remote key fob.

Delicately try to pry apart your keyless entry remote with flat head screwdriver. Change 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 charge cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.

Before assembling keyless entry fob's case, verify that everything is functioning by testing buttons on keyless entry remote.

The last thing to do is put your cover back on fob. Delicately try to assemble the pieces together by hands from top to bottom. Check your keyless entry remote body for gaps. If it is not tightly closed try to repeat last step.

Key Fob Battery Replacement 2004 Mercedes-Benz S500 Video

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

Still not working? Buy new one

Frequently Asked Questions

Key fob of Mercedes-Benz S500 require 2xCR2025 batteries. Most CR2025 batteries are under $6 depending on the size packaging, brand and type you buy. You can take old battery to the store, to be sure.

Usually, after keyless entry remote battery replace, reprogramming not required. Don't be scare of this procedure, because often it's described in user's manual.

Replacing your keyless entry remote battery is simple to do in 2004 Mercedes-Benz S500. Most of car manufacturers think of the clients and make a special hole for keyless entry remote disassembly.

Dealer service price for replace the battery in fob is $50-600 depending on the brand.

Key fob batteries in Mercedes-Benz S500 should be changed every three or four years, but this will vary based on their amount of use and quality. If your remote key fob decreased signal strength, you should replace batteries before it stop close doors and make trouble for you.

These signs will alert you that it's possible time to replace battery in your 2004 Mercedes-Benz S500: key fob buttons not working, signal strength reduced, multiple clicks to unlock or lock doors required and low key battery indicator on dashboard.
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Fob Compatibility:

  2. Models: 1999-2006 Mercedes-Benz S500