How to Open Your 2003 Mercedes-Benz ML320 Key Fob & Change Battery

How to Open Your 2003 Mercedes-Benz ML320 Key Fob & Change Battery

If your auto remote key fob is not working properly, the battery more likely must to be replaced. In this article, we outlined how to disassembly your key fob and change your Mercedes-Benz key battery step by step.

What is the battery key fob use

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

Simple steps to replace the battery in your ML320's remote key fob

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

Accurately try to pry apart your remote key fob with flat head screwdriver. Replace two CR2025 batteries with flat head screwdriver.

Now it's time to install new batteries in keyless entry fob's shell. Battery must be placed with the same polarity as was a previous. Your key will not work if you by mistake put battery wrong way.

After the new batteries installed, check remote key fob by pressing buttons. If all functions works, assemble your fob’s body in reverse order.

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

Video of key opening

How To Replace A 1998 - 2001 Mercedes Benz ML320 Key Fob Battery FCCID: KR 55

Still not working? Buy new one


Remote key fob of Mercedes-Benz ML320 require 2xCR2025 batteries. Most CR2025 batteries are under $4-6 build upon the brand, size packaging and type you buy. You can take old battery to the store, to be sure.

Usually, after keyless entry remote battery change, you do not need to reprogram. Don't be scare of this procedure, because often it's described in user's manual.

Changing your remote key fob battery is simple to do in 2003 Mercedes-Benz ML320. Most of car manufacturers think about clients and make a special hole for key fob open.

The price to change the battery in keyless entry remote is $50-600 depending on the make and the service pricing.

Remote key fob batteries in Mercedes-Benz ML320 should be changed once in 4 years, also this will differ based on usage and battery quality. If your key fob shortened signal strength, you should replace batteries before it stop open doors and make trouble for you.

If your ML320 key fob buttons not working, fob's battery more than 4 years old, need multiple clicks to unlock or lock doors or signal strength reduced, it's probably battery replace inside keyless entry remote needed. Current battery is dead or weak with a high probability, but if it's not help to fix issues, fob replace or repair needed.
Be the first to comment.
Your message is required.

Fob Compatibility:

  1. FCC ID: IYZ 3312
  2. Models: 2000-2003 Mercedes-Benz ML320