Mercedes-Benz A-Class 2021 Operator's Manual page 339

Display messages Possible causes/consequences and
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* The SmartKey cannot be detected and may no longer be in the vehicle.
Key Not Detected (red dis‐
play message)
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* A warning tone also sounds. This message reminds you to take your SmartKey with you when you leave the vehicle.
Don't Forget Your Key
Place the Key in the * SmartKey detection is malfunctioning.
Marked Space See Opera-
tor's Manual
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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Change the location of the SmartKey in the vehicle.
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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 337
M M Solutions
page 127).
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page 127).
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