How to Open Your 2001 Mercedes-Benz C320 Key Fob & Change Battery

How to Open Your 2001 Mercedes-Benz C320 Key Fob & Change Battery

Key fob grant access to your car. Once the key fob battery is dead or weak you lose your keyless entry fob's ability to use remote opportunities. In this article, you’ll benefit from knowing how to open your keyless entry remote and replace a weak or dead battery yourself. If you gonna solve to do it at home near C320, use this guide, but first make sure you have everything you need before you start.

What type battery key fob use

Before beginning open keyless entry remote check all that you need: two CR2025 batteries and flat head screwdriver.
  • flat head screwdriver
  • 2xCR2025 batteries

Step by step instruction

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

Carefully try to open your key with pry tools. Remove CR2025 batteries with flat head screwdriver.

Replace old batteries with fresh one CR2025. Every battery has a negative and positive side and if you put the wrong connector down, the current 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 everything is functioning, assemble your fob’s case in reverse order.

The last thing to do is put your cover back on fob. Delicately try to assemble the two halves in place by hands from top to bottom. Check your 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


Keyless entry remote of Mercedes-Benz C320 require 2xCR2025 batteries. Most CR2025 batteries are under $6 depending on the type, brand and size packaging you buy. Take your old battery to the store, 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 replace battery in your 2001 Mercedes-Benz C320 key fob yourself. Most hard part is to disassembly fob’s case. It's pretty easy with our guide.

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

Keyless entry remote batteries in modern cars should be replaced once in 3-4 years, but this will vary based on their amount of use and quality. If your keyless entry remote shortened signal strength, you should change batteries before it stop close doors and make trouble for you.

These signs will warn you that it's perhaps time to change battery in your Mercedes-Benz C320: multiple clicks to unlock or lock doors required, signal strength reduced, key fob buttons not working and you didn't change battery more than 4 years.
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Fob Compatibility:

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