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  • S-Class
  • Saloon long version
  • 12/2020
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Replacing the key battery
DANGER Risk of fatal injuries if batteries are swallowed

Batteries contain toxic and corrosive substances. Swallowing batteries may cause severe internal burns within two hours.

There is a risk of fatal injury.

Keep batteries out of the reach of children.
If the cover and/or lid of the battery compartment does not close securely, do not use the key and keep it away from children.
If batteries are swallowed, seek medical attention immediately.
ENVIRONMENTAL NOTE Environmental damage due to improper disposal of batteries

Batteries contain pollutants. It is illegal to dispose of them with the household rubbish.

Dispose of batteries in an environmentally responsible manner. Take discharged batteries to a qualified specialist workshop or to a collection point for used batteries.
Requirements:

  • You require a CR 2032 3 V cell battery.

Mercedes-Benz recommends that you have the battery replaced at a qualified specialist workshop.

Remove the emergency key More.
Press emergency key into the opening in the key in the direction of the arrow until cover opens. When doing so, do not hold cover closed.
Insert emergency key into the opening and lift up covering and remove it.
Repeatedly tap the key against your palm until battery falls out of the key.
Insert the new battery with the positive pole facing upwards. Use a lint-free cloth to do so.
Make sure that the surface of the battery is free of lint, grease and other impurities.
Insert the front tabs of covering into the housing and then press on both sides to close it.
Make sure that covering is completely closed.
Insert the front tabs of cover into the housing and then press until it is completely closed.
Insert the emergency key again More.
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