How to Replace the Battery in a 2001 Mercedes-Benz C240 Key Fob

How to Replace the Battery in a 2001 Mercedes-Benz C240 Key Fob

If your Mercedes-Benz key isn't working perfectly, the battery more likely needs to be replaced. Below, we are going to tell you how to open Mercedes-Benz remote key fob and change a dead or weak battery DIY. If you decide to do it at home near C240, use this instruction, but first make sure you have all you need before you start.

What type battery key fob require

Before starting open key fob make sure that you have all recommended tools and materials: 2xCR2025 batteries and flat head screwdriver.
  • 2xCR2025 batteries
  • flat head screwdriver

Simple steps to replace the battery in your car's key fob

Inside of your keyless entry remote installed button battery. Remove any internal key before you try to pry apart the key fob.

Carefully try to open your keyless entry remote with pry tools. Change CR2025 batteries with flat head screwdriver.

Now it's time to install new batteries inside fob’s body. Battery must be installed with the same polarity as was a previous. Your keyless entry remote will not work if you mistakenly place battery wrong way.

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

The last thing to do is put your cover back on fob. Accurately try to assemble the pieces in place by hands from top to bottom. If your key body firmly closed, we done. If not, repeat the last step.

How to change the battery video guide

Mercedes Benz Key Fob Case Change and Battery Replacement Remote

Still not working? Buy new one

Frequently Asked Questions

Remote key fob of Mercedes-Benz C240 use 2xCR2025 batteries. Price for CR2025 batteries are under $4-6 build upon the type, brand and size packaging you buy. You can take old battery to the store, with you to find a proper replacement.

Usually, after keyless entry remote battery replace, reprogramming not required. Remote key fob reprogramming procedure often described in user's manual of your vehicle.

Changing your key fob battery is easy to do in 2001 Mercedes-Benz C240. Most of car manufacturers think about customers and make a special hole for key fob disassembly.

The price to replace the battery inside key fob is $50-600 depending on the make and the service station.

You should replace batteries inside keyless entry remote of Mercedes-Benz C240 at least every four years. The lifetime of battery vary on usage time, operating conditions and quality.

If your Mercedes-Benz need multiple clicks to unlock or lock doors, signal strength reduced, has low key battery indicator on dashboard or key fob buttons not working, it's probably battery replace in keyless entry remote required. Currently installed battery is discharged with a high probability, but if it's not fix problem, key fob change or repair required.
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Other Mercedes-Benz Models:

Fob Compatibility:

  2. Models: 2001-2005 Mercedes-Benz C240