How to change Mercedes key battery?

There are a few things that you need to know about your Mercedes key. Before proceeding to the battery replacement, find out what type of key you have.

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A SmartKey requires 2 CR 2025 batteries, same too for the older chrome key. Follow the process below for battery replacement:

  • Pull the latch at the end of the key holder
  • Put your key horizontally into the open slot
  • Take the battery compartment out
  • Replace the existing CR 2025 batteries with two new ones

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