How to Open Your 2005 Mercedes-Benz S65 AMG Key Fob and Change Battery

If your S65 AMG key fob is no longer working properly, the cell battery probably must to be replaced. Yes, it is possible to change the battery in your keyless entry remote, and itโs easier than you think. All you need is explained in this article.
What size battery does 2005 Mercedes-Benz S65 AMG keyless entry remote required
Prior to open keyless entry remote check all that you need: 2xCR2025 batteries and flat head screwdriver.- 2xCR2025 batteries
- flat head screwdriver
Step by step instruction
A tiny button cell battery installed inside the your keyless entry remote. Remove any internal key first, and then try to pry apart the remote key fob.
Delicately try to disassemble your remote key fob with hands or flat head screwdriver. Remove 2xCR2025 batteries with flat head screwdriver.
Now it's time to install new batteries inside fobโs case. Battery must be installed with the same polarity as was an old. Your key will not work if you by mistake put battery wrong way.
After the new batteries installed, check keyless entry remote by pressing buttons. If all functions works, assemble your keyless entry fob's case in reverse order.
The last thing to do is put your cover back on fob. Carefully try to assemble the two halves in place by hands from top to bottom. If your keyless entry remote case tightly closed, we done. If not, repeat the last step.
How to replace the battery video instruction
SOLVED - Mercedes Benz Keyfob Battery Replacement | Smart Key Fob Dead Batteries
Still not working? Buy new one