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key fob battery
A smart key is a vehicular passive entry system developed by Siemens in 1995 and introduced by Mercedes-Benz under the name "Keyless-Go" in 1998 on the W220 S-Class, after the design patent was filed by Daimler-Benz on May 17, 1997.
Numerous manufacturers subsequently developed similar passive systems that unlock a vehicle on approach — while the key remains pocketed by the user.
Yesterday and today I had to use the NFC card because the key wasn’t working. I figured the battery was dead after only six months. The person that designed the fob likely never disassembled it. It is without a doubt the most user hostile fob on which I have changed the battery. Good...
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