2010 Mercedes-Benz S400 Key Fob Battery Replacement Guide
Keyless entry remote allow easy access to your Mercedes-Benz. When the keyless entry remote battery is weak or dead you will not to be able unlock trunk or doors remotely. In this case, you’ll benefit from knowing how to open your car keyless entry remote and replace a weak battery yourself. If you choose to do it at home near S400, use this guide, but don't forget to check everything you need before you start.
What is the battery key fob requireBefore beginning disassembly remote key fob be sure that you have all required tools and materials: flat head screwdriver and two CR2025 batteries.
- 2xCR2025 batteries
- flat head screwdriver
Step by step guide
Inside of your remote key fob installed small button battery. Remove any internal key before you try to pry apart the remote key fob.
Gently try to disassemble your keyless entry remote with flat head screwdriver. Remove 2xCR2025 batteries with flat head screwdriver.
Now it's time to install new batteries in fob’s case. Every battery has a negative and positive side and if you put the wrong connector down, the charge cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.
Before assembling fob’s case, verify that all functions works by testing buttons on keyless entry remote.
At this point squeeze keyless entry fob's back cover together. Line your body two halves together and assemble it together by hands from top to bottom. Check your key shell for gaps. If it is not firmly closed try to repeat last step.
Key Fob Battery Replacement 2010 Mercedes-Benz S400 Video
SOLVED - Mercedes Benz Keyfob Battery Replacement | Smart Key Fob Dead Batteries