How to Open Your 1998 Mercedes-Benz C280 Key Fob & Change Battery

How to Open Your 1998 Mercedes-Benz C280 Key Fob & Change Battery

Key fob grant easy access to your auto. If the keyless entry remote battery is discharged you lose your keyless entry fob's ability to use remote functions. In this post, you will benefit from knowing how to open your remote key fob and change a dead battery DIY. If you decide to do it at home near C280, use this guide, but don't forget to check everything you need.

What kind of battery remote key fob use

Changing batteries in 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.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step guide

Inside of your remote key fob installed tiny button cell battery. Move the key out of the way if it is in the remote key fob.

Carefully try to open your key with flat head screwdriver. Change CR2025 batteries with flat head screwdriver.

Get new batteries and install it inside keyless entry fob's case. Every battery has a negative and positive side and if you put the wrong connector down, the charge cannot go into your circuit board and make it work. Check position on battery, by "+" mark.

After the new batteries installed, verify key fob by pressing buttons. If all functions works, assemble your fob’s case in reverse order.

At this point squeeze keyless entry fob's back cover together. Line your shell pieces together and put it in place 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 Replace Mercedes Benz C280 Key Fob Battery 1998 1999 2000

Still not working? Buy new one


Keyless entry remote of Mercedes-Benz C280 use 2xCR2025 batteries. Price for CR2025 batteries are under $5 build upon the type, size packaging and brand you buy. Take your old battery to the store, to find a proper replacement.

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

Yes, you can replace battery in your 1998 Mercedes-Benz C280 keyless entry remote yourself. Most hard part is to open fob’s case. It's pretty simple with our step by step guide.

Dealer service pricing for replace the battery in fob is $50-600 depending on the car.

Key fob batteries in modern cars should be changed every three years, but this will differ based on their amount of use and battery quality. If your keyless entry remote reduced signal strength, you should replace batteries before it stop open doors and make trouble for you.

These symptoms will warning you that it's probably time to replace battery in your 1998 Mercedes-Benz C280: low key battery indicator on dashboard, key fob buttons not working, you didn't change battery more than 4 years and multiple clicks to unlock or lock doors required.
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Other Mercedes-Benz Models:

Fob Compatibility:

  2. Models: 1998-2000, 2006 Mercedes-Benz C280