1995 Mercedes-Benz S420 Key Fob Battery Replacement Instructions

1995 Mercedes-Benz S420 Key Fob Battery Replacement Instructions

Keyless entry remote grant easy access to your auto. If the remote key fob battery is weak or dead you’ll not to be able open doors remotely. Yes, it is possible to replace the battery in your remote key fob with our guide. All tools, that you need is explained in this article.

What is the battery key fob use

Before beginning open keyless entry remote check all that you need: two CR2025 batteries and flat head screwdriver.
  • 2xCR2025 batteries
  • flat head screwdriver

Step by step instruction

Inside of your keyless entry remote installed coin cell battery. Open key before you try to pry apart the keyless entry remote.

Carefully try to pry apart your key with pry tools. Replace 2 CR2025 batteries with flat head screwdriver.

Replace old batteries with fresh one CR2025. Battery must be installed with the same polarity as was an old. Your key fob will not work if you by mistake put battery wrong way.

When the new batteries installed, verify key fob by pressing buttons. If all functions works, assemble your keyless entry fob's shell in reverse order.

At this point squeeze fob’s back cover together. Line your shell pieces together and put it together by hands from top to bottom. Inspect your key body for gaps. If it is not firmly closed try to repeat last step.

How to change the battery video guide

Mercedes 94 S-Class Key Battery

Still not working? Buy new one

FAQ

Remote key fob of Mercedes-Benz S420 require 2xCR2025 batteries. Most CR2025 batteries are under $4-6 build upon the type, size packaging and brand you buy. Take your old battery to the store, to be sure.

Usually, after keyless entry remote battery replace, reprogramming not required. Key fob reprogramming procedure often described in user's manual of your vehicle.

Yes, you can replace battery in your 1995 Mercedes-Benz S420 key yourself. Most difficult part is to disassembly fob’s case. It's pretty simple with our guide.

The cost to replace the battery in fob is $50-600 depending on the car and the service station.

Remote key fob batteries in Mercedes-Benz S420 should be replaced once in 4 years, although this will vary based on usage and battery quality. If your keyless entry remote shortened signal strength, you should replace batteries before it stop open doors and make problems for you.

If your S420 signal strength reduced, fob's battery more than 4 years old, key fob buttons not working or need multiple clicks to unlock or lock doors, in most cases battery replace in key fob needed. Current battery is dead or weak with a high probability, but if it's not help, keyless entry remote replace or repair needed.
Be the first to comment.
Your message is required.

Other Mercedes-Benz Models:

Fob Compatibility:

  1. FCC ID: KR 55
  2. Models: 1995-1999 Mercedes-Benz S420