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.

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  1. Rolfe

    Key fob battery

    Just a couple of days after my car's third birthday (and at about 31,500 miles) I got a low key battery warning on the dashboard. I just popped a new battery into the fob and all seems well. Is this the sort of life span others have been experiencing?
  2. Chongma

    Key Fob Battery

    After 18 months of nearly daily usage, had a low key battery message pop up on the dash. Looks straight fwd enough, p.123 of the manual with a CR2032 battery. Ok, that took a lot longer than expected. Step 1: Pry off the clip and open lower cover. Problem here is knowing how much force to use...
  3. evets

    Key fob battery

    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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