How to Replace the Battery in a 2003 Mercedes-Benz C280 Key Fob

How to Replace the Battery in a 2003 Mercedes-Benz C280 Key Fob

If your Mercedes-Benz keyless entry remote is not working perfectly, the battery likely must to be changed. In this post, we walks you through how to open your keyless entry remote and replace your Mercedes-Benz key battery.

What type battery does 2003 Mercedes-Benz C280 keyless entry remote take

Changing batteries in keyless entry remote require flat head screwdriver and two CR2025 batteries. Prepare these materials and tools before opening and make sure to match the size of your keyless entry fob's batteries.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

Inside of your remote key fob installed small coin battery. Move the key out of the way if it is in the keyless entry remote.

Gently try to pry apart your key fob 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 charge cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.

After the new batteries installed, verify remote key fob by pressing buttons. If everything working properly, 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 assemble the pieces together by hands from top to bottom. Check your keyless entry remote case for gaps. If it is not firmly closed try to repeat last step.

Key Fob Battery Replacement 2003 Mercedes-Benz C280 Video

SOLVED - Mercedes Benz Keyfob Battery Replacement | Smart Key Fob Dead Batteries

Still not working? Buy new one

FAQ

Remote key fob of Mercedes-Benz C280 use 2xCR2025 batteries. Most CR2025 batteries are under $4 depending on the type, brand and size packaging you buy. Take your old battery to the store, to find a proper replacement.

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

Replacing your remote key fob battery is easy to do in 2003 Mercedes-Benz C280. Most of car manufacturers think of the clients and make a special hole for keyless entry remote open.

Auto repair shop's pricing for replace the battery in key is from 50 to 600 dollars depending on the brand.

You should change batteries inside remote key fob of Mercedes-Benz C280 at least once in three or four years. lifespan of battery differ on frequency of use, operating conditions and quality.

If your car key fob buttons not working, fob's battery more than 4 years old, signal strength reduced or has low key battery indicator on dashboard, it's probably battery change inside remote key fob needed. Current battery is weak or dead with a high probability, but if it's not fix, key change or repair needed.
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Fob Compatibility:

  1. FCC ID: IYZ 3312
  2. Models: 2000-2006 Mercedes-Benz C280