How to Open Your 1997 Mercedes-Benz SL320 Key Fob and Change Battery

How to Open Your 1997 Mercedes-Benz SL320 Key Fob and Change Battery

If your SL320 key fob is not open doors properly, the battery most likely needs to be changed. It's not difficult to replace the battery in your keyless entry remote, and itโ€™s easier than you think. All tools, that you need is outlined in this article.

What is the battery remote key fob require

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

Simple steps to replace the battery in your SL320's key fob

Inside of your key fob installed small coin cell battery. Open the key if it is in the remote key fob.

Delicately try to pry apart your fob with hands or flat head screwdriver. Replace 2xCR2025 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 polarity on battery, by "+" mark.

Before assembling fobโ€™s case, verify that all working fine by pressing buttons on key fob.

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

Video of keyless entry remote opening

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

Frequently Asked Questions

Key fob of Mercedes-Benz SL320 require 2xCR2025 batteries. Most CR2025 batteries are under $6 build upon the brand, size packaging and type you buy. Take your old battery to the store, to find a proper replacement.

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

Yes, you can change battery in your 1997 Mercedes-Benz SL320 keyless entry remote yourself. Most hard part is to disassembly keyless entry fob's case. It's pretty simple with our guide.

The cost to change the battery inside fob is $50-600 depending on the brand and the service pricing.

You should change batteries inside remote key fob of modern cars at least every three years. The term of battery vary on frequency of use, operating conditions and quality. Famous brands cells usually will last longer.

If your auto fob's battery more than 4 years old, has low key battery indicator on dashboard, need multiple clicks to unlock or lock doors or key fob buttons not working, it's probably battery replace inside key fob needed. Currently installed battery is dead with a high probability, but if it's not help to fix issues, key change or repair needed.
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Fob Compatibility:

  1. FCC ID: KR 55
  2. Models: 1995-1997 Mercedes-Benz SL320