How to Open Your 2004 Mercedes-Benz CLK320 Key Fob and Change Battery

How to Open Your 2004 Mercedes-Benz CLK320 Key Fob and Change Battery

If your CLK320 remote key fob is no longer open doors correct, the battery probably needs to be replaced. Yes, it is possible to replace the battery in your key fob, and it’s easier than you think. All you need is described in this post.

What kind of battery key fob use

Before starting disassembly key fob check all that you need: flat head screwdriver and CR2025 batteries.
  • flat head screwdriver
  • 2xCR2025 batteries

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

A small coin cell battery installed inside the your key fob. Move the key out of the way if it is in the remote key fob.

Gently try to pry apart your key fob with flat head screwdriver. Replace 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 current cannot go into your circuit board and make it work. Check position on battery, by "+" mark.

When the new batteries installed, check keyless entry remote functionality by pressing buttons. If everything working fine, assemble your keyless entry fob's shell in reverse order.

The last thing to do is put your cover back on fob. Carefully try to assemble the pieces together by hands from top to bottom. If your fob case firmly closed, we done. If not, repeat the last step.

How to replace the battery video instruction

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

Still not working? Buy new one

Frequently Asked Questions

Remote key fob of Mercedes-Benz CLK320 require 2xCR2025 batteries. Most CR2025 batteries are under $4 depending on the size packaging, type and brand you buy. You can take old battery to the store, to find a proper replacement.

Often, after remote key fob battery replace, reprogramming not required. Don't be scare of this procedure, because often it's described in user's manual.

Replacing your remote key fob battery is simple to do in 2004 Mercedes-Benz CLK320. Most of car manufacturers think of the clients and make a special hole for keyless entry remote open.

The cost to replace the battery in remote key fob can run anywhere from $30 to as high as $500 depending on the brand and the service pricing.

Key fob batteries in Mercedes-Benz CLK320 should be changed every three or four years, although this will vary based on their amount of use and quality. If your key fob reduced signal strength, you should replace batteries before it stop open doors and make problems for you.

If your auto signal strength reduced, need multiple clicks to unlock or lock doors, fob's battery more than 4 years old or key fob buttons not working, it's probably battery change in key fob required. Currently installed battery is weak or dead with a high probability, but if it's not fix problem, key fob replace or repair required.
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Fob Compatibility:

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