How to Open Your 2003 Mercedes-Benz C32 AMG Key Fob & Change Battery

How to Open Your 2003 Mercedes-Benz C32 AMG Key Fob & Change Battery

Remote key fob grant access to your Mercedes-Benz. If the remote key fob battery is discharged you’ll lose your keyless entry fob's ability to use distance functions. In this post, we demonstrate how to disassembly your key fob and change a weak or dead battery yourself. If you decide to do it at home near C32 AMG, follow our guide, but first make sure you have all you need before you start.

What size battery does 2003 Mercedes-Benz C32 AMG remote key fob take

Prior to open remote key fob check all that you need: flat head screwdriver and two CR2025 batteries.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step guide

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

Carefully try to disassemble your key fob with pry tools. Replace two CR2025 batteries with flat head screwdriver.

Replace old batteries with new one CR2025. Be sure to connect the battery the right way around in a circuit. Your key fob will not work if you place battery wrong way.

Before assembling keyless entry fob's case, make sure that all functions works by testing buttons on key fob.

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

Video of key fob disassembly

Mercedes Benz Key Fob Case Change and Battery Replacement Remote

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Mercedes-Benz C32 AMG require 2xCR2025 batteries. Price for CR2025 batteries are under $6 depending on the brand, type and size packaging you buy. Take your old battery to the store, with you to find a proper replacement.

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

Yes, you can replace battery in your 2003 Mercedes-Benz C32 AMG key fob yourself. Most difficult part is to open keyless entry fob's case. It's pretty simple with our step by step guide.

The price to replace the battery inside keyless entry remote is $50-600 depending on the car and the service station.

You should replace batteries inside remote key fob of modern cars at least every four years. lifespan of battery vary on frequency of use, operating conditions and quality. Famous brands cells usually will last longer.

If your C32 AMG has low key battery indicator on dashboard, fob's battery more than 4 years old, signal strength reduced or key fob buttons not working, in most cases battery change inside remote key fob needed. Currently installed battery is dead or weak with a high probability, but if it's not fix, key fob change or repair needed.
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Other Mercedes-Benz Models:

Fob Compatibility:

  1. FCC ID: IYZ 3312
  2. Models: 2002-2004 Mercedes-Benz C32 AMG