How to Replace the Battery in a 1998 Mercedes-Benz CLK320 Key Fob

How to Replace the Battery in a 1998 Mercedes-Benz CLK320 Key Fob

Key fob grant easy access to your CLK320. When the remote key fob battery is weak or dead you’ll lose your keyless entry fob's ability to use distance opening function. In this post, we outlined how to disassembly your keyless entry remote and change your Mercedes-Benz key battery.

What kind of battery key fob use

Replacing batteries in remote key fob require flat head screwdriver and 2 CR2025 batteries. Prepare these materials and tools before opening and make sure to match the size of your fob’s batteries.
  • flat head screwdriver
  • 2xCR2025 batteries

Simple steps to change the battery in your CLK320's key fob

A coin battery installed inside the your remote key fob. Remove any internal key before you try to pry apart the keyless entry remote.

Carefully try to disassemble your key with hands or flat head screwdriver. Replace CR2025 batteries with flat head screwdriver.

Now it's time to install new batteries in keyless entry fob's shell. 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.

When the new batteries installed, verify remote key fob functionality by pressing buttons. If everything working properly, assemble your keyless entry fob's case in reverse order.

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. Check your keyless entry remote shell for gaps. If it is not tightly closed try to repeat last step.

Video of 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

Key fob of Mercedes-Benz CLK320 use 2xCR2025 batteries. Price for CR2025 batteries are under $5 build upon the type, brand and size packaging you buy. Take your old battery to the store, to find a proper replacement.

Often, 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.

Replacing your key fob battery is easy to do in 1998 Mercedes-Benz CLK320. Most of car manufacturers think of the customers and make a special hole for keyless entry remote disassembly.

Car service cost for change the battery in key fob is from $30 to as high as $500 depending on the make.

You should replace batteries inside key fob of Mercedes-Benz CLK320 at least every three or four years. lifespan of battery vary on frequency of use, operating conditions and quality.

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

Fob Compatibility:

  1. FCC ID: IYZ VECTOR
  2. Models: 1998-2005 Mercedes-Benz CLK320