How to Open Your 1998 Mercedes-Benz S320 Key Fob & Change Battery

How to Open Your 1998 Mercedes-Benz S320 Key Fob & Change Battery

If your S320 key fob is not unlock doors correct, the cell battery most likely needs to be replaced. Below, we described how to open your keyless entry remote and change your Mercedes-Benz key battery.

What kind of battery remote key fob use

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

Step by step instruction

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

Carefully try to disassemble your remote key fob with pry tools. Change 2xCR2025 batteries with flat head screwdriver.

Now it's time to install new batteries inside keyless entry fob's case. Be sure to connect the battery the right way around in a circuit. Your keyless entry remote will not work if you place battery wrong way.

After the new batteries installed, check key fob by pressing buttons. If everything working properly, assemble your fob’s case in reverse order.

At this point squeeze fob’s back cover together. Line your body pieces together and put it together by hands from top to bottom. If your fob case tightly closed, we done. If not, repeat the last step.

How to change the battery video instruction

How To Replace A 1995 - 1999 Mercedes Benz Flip Open Switch Blade Style Key Fob Battery FCC ID KR 55

Still not working? Buy new one

FAQ

Remote key fob of Mercedes-Benz S320 use 2xCR2025 batteries. Price for CR2025 batteries are under $5 depending on the size packaging, type and brand you buy. You can take old battery to the store, to find a proper replacement.

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

Yes, you can change battery in your 1998 Mercedes-Benz S320 key yourself. Most difficult part is to open fob’s case. It's pretty simple with our guide.

Auto repair shop's pricing for replace the battery in remote key fob is from $30 to as high as $500 depending on the brand.

You should replace batteries inside remote key fob of Mercedes-Benz S320 at least once in three or four years. The lifetime of battery differ on frequency of use, operating conditions and quality.

These symptoms will warn you that it's perhaps time to replace battery in your Mercedes-Benz S320: you didn't change battery more than 4 years, signal strength reduced, low key battery indicator on dashboard and key fob buttons not working.
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Fob Compatibility:

  1. FCC ID: KR 55
  2. Models: 1995-1999 Mercedes-Benz S320