Mercedes-Benz S-Class 2020 Operator's Manual page 499

Display messages Possible causes/consequences and
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* The SmartKey battery is discharged.
Replace Key Battery
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* The SmartKey is currently undetected.
Key Not Detected (white
display message)
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* The SmartKey cannot be detected and may no longer be in the vehicle.
Key Not Detected (red dis‐
play message)
Replace the battery ( page 66).
/
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Change the location of the SmartKey in the vehicle.
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If the SmartKey is still not recognized, place it in the marked space for starting with the SmartKey
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( page 173).
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The SmartKey is no longer in the vehicle and you switch off the engine:
You can no longer start the engine.
R
You cannot centrally lock the vehicle.
R
Ensure that the SmartKey is in the vehicle.
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If the SmartKey detection function has a malfunction due to a strong radio signal source:
Stop the vehicle immediately in accordance with the traffic conditions.
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Place the SmartKey in the marked space for starting the engine with the SmartKey (
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Display messages and warning/indicator lamps 497
M M Solutions
page 173).
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