How to Replace the Battery in a 2004 Mercedes-Benz CLK55 AMG Key Fob

How to Replace the Battery in a 2004 Mercedes-Benz CLK55 AMG Key Fob

If your car key fob is not open doors well, the battery probably needs to be replaced. Below, we explained how to open your key fob and change your Mercedes-Benz key battery.

What size battery does 2004 Mercedes-Benz CLK55 AMG key fob required

Prior to disassembly keyless entry remote check all that you need: 2 CR2025 batteries and flat head screwdriver.
  • 2xCR2025 batteries
  • flat head screwdriver

Simple steps to replace the battery in your CLK55 AMG's key fob

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

Gently try to open your keyless entry remote with flat head screwdriver. Remove 2xCR2025 batteries with flat head screwdriver.

Get new batteries and install it inside keyless entry fob's body. 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 key fob by pressing buttons. If everything working properly, assemble your keyless entry fob's shell in reverse order.

At this point squeeze keyless entry fob's back cover together. Line your case two halves together and assemble it in place by hands from top to bottom. Inspect your keyless entry remote shell for gaps. If it is not firmly closed try to repeat last step.

Video of key disassembly

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

Still not working? Buy new one


Remote key fob of Mercedes-Benz CLK55 AMG use 2xCR2025 batteries. Most CR2025 batteries are under $5 depending on the type, size packaging and brand you buy. You can take old battery to the store, to be sure.

Remote key fob in most of cases do not need to be reprogrammed after battery change. If your key not working, recheck new battery voltage. Otherwise, read user's manual or contact local dealer.

Yes, you can replace battery in your 2004 Mercedes-Benz CLK55 AMG key fob yourself. Most hard part is to open fob’s case. It's pretty simple with our instruction.

Dealer service price for replace the battery in keyless entry remote is $50-600 depending on the car.

You should change batteries inside keyless entry remote of Mercedes-Benz CLK55 AMG at least once in three years. lifespan of battery differ on their amount of use, quality and operating conditions.

These signs will alert you that it's possible time to replace battery in your Mercedes-Benz CLK55 AMG: signal strength reduced, low key battery indicator on dashboard, key fob buttons not working and you didn't change battery more than 4 years.
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Other Mercedes-Benz Models:

Fob Compatibility:

  2. Models: 2001-2006 Mercedes-Benz CLK55 AMG