How to Open Your 2002 Mercedes-Benz C320 Key Fob & Change Battery

How to Open Your 2002 Mercedes-Benz C320 Key Fob & Change Battery

Keyless entry remote grant easy access to your auto. Once the remote key fob battery is weak you not to be able unlock car from distance. Below, we described how to disassembly your car remote key fob and change your Mercedes-Benz key battery step by step.

What type battery keyless entry remote use

Before starting disassembly remote key fob check all that you need: flat head screwdriver and 2xCR2025 batteries.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

A tiny coin cell battery installed inside the your key fob. Remove any internal key first, and then try to pry apart the keyless entry remote.

Carefully try to pry apart your remote key fob with pry tools. Replace 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 keyless entry remote will not work if you place battery wrong way.

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

The last thing to do is put your cover back on fob. Accurately try to put the two halves in place by hands from top to bottom. Inspect your key body for gaps. If it is not tightly closed try to repeat last step.

Video of remote key fob opening

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

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Mercedes-Benz C320 use 2xCR2025 batteries. Most CR2025 batteries are under $5 build upon the size packaging, brand and type you buy. You can take old battery to the store, to be sure.

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

Yes, you can replace battery in your 2002 Mercedes-Benz C320 keyless entry remote yourself. Most difficult part is to open fob’s case. It's pretty easy with our guide.

Dealer service cost for replace the battery in key is $50-600 depending on the make.

Key fob batteries in Mercedes-Benz C320 should be replaced every three years, although this will differ based on usage and quality. If your keyless entry remote decreased signal strength, you should replace batteries before it stop open doors and make problems for you.

These signs will warn you that it's perhaps time to change battery in your 2002 Mercedes-Benz C320: signal strength reduced, you didn't change battery more than 4 years, low key battery indicator on dashboard and multiple clicks to unlock or lock doors required.
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Other Mercedes-Benz Models:

Fob Compatibility:

  1. FCC ID: IYZ 3312
  2. Models: 2001-2005 Mercedes-Benz C320