How to Open Your 2011 Mercedes-Benz E500 Key Fob and Change Battery
If your Mercedes-Benz keyless entry remote is no longer open doors properly, the battery surely must to be replaced. In this case, you will benefit from knowing how to disassembly your key fob and replace a weak battery DIY. If you gonna solve to do it at home near E500, follow our instruction, but first make sure you have tools and materials required before you start.
What kind of battery key fob requirePrior to open remote key fob check all that you need: flat head screwdriver and 2xCR2025 batteries.
- flat head screwdriver
- 2xCR2025 batteries
Simple steps to change the battery in your car's keyless entry remote
Inside of your key fob installed coin cell battery. Remove any internal key before you try to pry apart the keyless entry remote.
Delicately try to pry apart your key with hands or flat head screwdriver. Change 2 CR2025 batteries with flat head screwdriver.
Now it's time to install new batteries inside fob’s shell. 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 keyless entry fob's case, check that everything is functioning by pressing buttons on circuit board.
At this point squeeze keyless entry fob's back cover together. Line your body pieces together and put it together by hands from top to bottom. If your remote key fob case firmly closed, we done. If not, repeat the last step.
Video of key opening
SOLVED - Mercedes Benz Keyfob Battery Replacement | Smart Key Fob Dead Batteries