How to Replace the Battery in a 2004 Mercedes-Benz C230 Key Fob

How to Replace the Battery in a 2004 Mercedes-Benz C230 Key Fob

Key fob allow easy access to your car. Once the key battery is weak or dead you’ll lose your keyless entry fob's ability to use remote opening function. In this article, you’ll benefit from knowing how to disassembly your key fob and replace a dead battery yourself. If you gonna solve to do it at home near C230, use this guide, but first make sure you have tools and materials required.

What size battery does 2004 Mercedes-Benz C230 keyless entry remote take

Don't forget before disassembly key fob make sure that you have all required tools and materials: two CR2025 batteries and flat head screwdriver.
  • flat head screwdriver
  • 2xCR2025 batteries

Simple steps to replace the battery in your C230's remote key fob

Inside of your keyless entry remote installed tiny button battery. Remove any internal key first, and then try to pry apart the remote key fob.

Delicately try to disassemble your fob with flat head screwdriver. Change 2xCR2025 batteries with flat head screwdriver.

Now it's time to install new batteries inside fob’s case. 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 fob’s case, check that all functions works by pressing buttons on key fob.

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

How to change the battery video instruction

HOW TO Mercedes Benz KeyFob Battery Replacement. Smart key keyless BRC c230 sl500 e320 ml320 DIY Fix

Still not working? Buy new one

FAQ

Key fob of Mercedes-Benz C230 use 2xCR2025 batteries. Most CR2025 batteries are under $6 depending on the type, size packaging and brand you buy. Take your old battery to the store, with you to find a proper replacement.

Key fob in most of cases reprogramming not required after battery replace. If your key fob not working, recheck new battery voltage. If it is not help, read user's manual or contact local dealer.

Yes, you can change battery in your 2004 Mercedes-Benz C230 key yourself. Most difficult part is to open keyless entry fob's case. It's pretty easy with our guide.

The cost to replace the battery in key is $50-600 depending on the make and the service station.

Key fob batteries in Mercedes-Benz C230 should be replaced once in 3-4 years, also this will differ based on their amount of use and build quality. If your keyless entry remote decreased signal strength, you should change batteries before it stop close doors and make trouble for you.

If your C230 fob's battery more than 4 years old, need multiple clicks to unlock or lock doors, has low key battery indicator on dashboard or signal strength reduced, in most cases battery replace inside key fob needed. Currently installed battery is weak with a high probability, but if it's not fix, keyless entry remote replace or repair required.
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Other Mercedes-Benz Models:

Fob Compatibility:

  1. FCC ID: IYZ VECTOR
  2. Models: 1998-2006 Mercedes-Benz C230