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452 Display messages and warning/indicator lamps
Key
Display messages
Â
Replace key
Replace key See Owner's
Manual
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Change key batteries
Possible causes/consequences and
* The key needs to be replaced.
Consult a qualified specialist workshop.
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* Vehicles with a digital vehicle key: only a few or no authorisations remain for starting the engine.
Make sure that the internet connection is not limited by certain mobile phone settings.
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Open the Mercedes me connect web app http://www.mercedes.me. and call up the digital vehicle key service.
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Deactivate the service first and then activate it again.
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If the display message still appears, contact the Mercedes-Benz Customer Assistance Center (CAC).
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Vehicles with a digital vehicle key sticker: only a few or no authorisations remain for starting the engine.
Order a new digital vehicle key sticker from a Mercedes-Benz Service Centre or at http://www.mercedes-
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benz.com/connect.
* The key battery is discharged.
Replace the battery(
→
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M M
Solutions
page 65).
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