Changing the batteries
Notes
It is advisable to have the batteries replaced at a qualified specialist workshop, e.g. at a Mercedes-Benz Service Centre.
 | Risk of poisoning |
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Batteries contain toxic and caustic substances. For this reason, keep batteries away from children.
If a battery is swallowed, consult a doctor immediately.
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 | Environmental note |
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Do not dispose of batteries with the household rubbish. They contain highly toxic substances.
Take discharged batteries to a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre, or to a special collection point for old batteries.
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Key
Checking the batteries
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Press the  or  button.
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The batteries are in order if the battery charge indicator lamp goes on briefly.
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Changing the batteries
You require two CR 2025 3V cell batteries.
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Remove the emergency key element from the key more.
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Remove old batteries  from the battery tray.
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Insert the new batteries underneath contact spring  with the positive terminal facing upwards. Use a lint-free cloth to do so.
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Push the battery tray back into the key housing until the battery tray engages.
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Check the function of all key buttons on the vehicle.
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