How to Replace the Battery in a 2003 Mercedes-Benz ML500 Key Fob

How to Replace the Battery in a 2003 Mercedes-Benz ML500 Key Fob

Remote key fob allow easy access to your ML500. Once the key fob battery is dead or weak you lose your fob’s ability to use distance functions. In this article, we demonstrate how to disassembly your car keyless entry remote and replace a discharged battery yourself. If you decide to do it at home near ML500, use this guide, but first make sure you have tools and materials required.

What type battery remote key fob use

Before going to disassembly keyless entry remote 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

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

Gently try to pry apart your keyless entry remote with pry tools. Change 2 CR2025 batteries with flat head screwdriver.

Replace 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 position on battery, by "+" mark.

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

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

How to change the battery video guide

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

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz ML500 use 2xCR2025 batteries. Most CR2025 batteries are under $4 depending on the size packaging, type and brand you buy. Take your old battery to the store, to be sure.

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

Changing your keyless entry remote battery is simple to do in 2003 Mercedes-Benz ML500. Most of car manufacturers think about customers and make a special hole for keyless entry remote open.

Car service pricing for replace the battery in fob is from 50 to 600 dollars depending on the make.

Remote key fob batteries in Mercedes-Benz ML500 should be changed every three or four years, also this will vary based on frequency of use and quality. If your remote key fob shortened signal strength, you should replace batteries before it stop working and make trouble for you.

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

  1. FCC ID: IYZ 3312
  2. Models: 2002-2006 Mercedes-Benz ML500