How to Open Your 2012 Mercedes-Benz S400 Key Fob and Change Battery
Remote key fob grant access to your S400. Once the key fob battery is dead or weak you will lose your keyless entry fob's ability to use remote functions. It's not difficult to replace the battery in your key fob by yourself. All you need is outlined in this article.
What type battery key fob useBefore beginning disassembly keyless entry remote check all that you need: flat head screwdriver and CR2025 batteries.
- flat head screwdriver
- 2xCR2025 batteries
Simple steps to change the battery in your car's key fob
A small coin battery installed in the your remote key fob. Remove any internal key before you try to pry apart the key fob.
Gently try to pry apart your keyless entry remote with flat head screwdriver. Change two CR2025 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 key fob will not work if you place battery wrong way.
Before assembling fob’s case, check that all is functioning by testing buttons on circuit board.
The last thing to do is put your cover back on fob. Delicately try to assemble the two halves in place by hands from top to bottom. If your remote key fob case tightly closed, we done. If not, repeat the last step.
Key Fob Battery Replacement 2012 Mercedes-Benz S400 Video
Mercedes Benz Key Battery Change Replacement
Still not working? Buy new one