How to Open Your 2001 Mercedes-Benz S430 Key Fob and Change Battery

How to Open Your 2001 Mercedes-Benz S430 Key Fob and Change Battery

Keyless entry remote allow access to your auto. Once the key battery is dead you lose your fob’s ability to use distance opening function. Below, you’ll benefit from knowing how to open Mercedes-Benz remote key fob and replace a weak battery yourself. If you decide to do it at home near S430, follow our instruction, but first make sure you have tools and materials required before you start.

What type battery does 2001 Mercedes-Benz S430 remote key fob take

Before you start to open remote key fob make sure that you have all required tools and materials: 2xCR2025 batteries and flat head screwdriver.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

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

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

Now it's time to install new batteries in keyless entry fob's case. Battery must be installed with the same position as was an old. Your key fob will not work if you mistakenly put battery wrong way.

After the new batteries installed, verify keyless entry remote functionality by pressing buttons. If everything working good, assemble your fob’s case in reverse order.

At this point squeeze fob’s back cover together. Line your body two halves together and put it in place by hands from top to bottom. If your key case tightly closed, we done. If not, repeat the last step.

How to replace the battery video instruction

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

Still not working? Buy new one


Key fob of Mercedes-Benz S430 require 2xCR2025 batteries. Most CR2025 batteries are under $4-6 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.

Often, after keyless entry remote battery replace, you do not need to reprogram. Keyless entry remote reprogramming procedure often described in user's manual of your vehicle.

Yes, you can change battery in your 2001 Mercedes-Benz S430 remote key fob yourself. Most hard part is to open fob’s case. It's pretty easy with our instruction.

Dealer service pricing for change the battery in keyless entry remote is from $30 to as high as $500 depending on the make.

Key fob batteries in Mercedes-Benz S430 should be changed once in three or four years, also this will differ based on usage and build quality. If your keyless entry remote reduced signal strength, you should replace batteries before it stop working and make problems for you.

These signs will alert you that it's probably time to change battery in your 2001 Mercedes-Benz S430: you didn't change battery more than 4 years, multiple clicks to unlock or lock doors required, signal strength reduced and low key battery indicator on dashboard.
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Other Mercedes-Benz Models:

Fob Compatibility:

  2. Models: 1999-2006 Mercedes-Benz S430