A- Class Owner's Manual - Page 496

For 2019 A 220 Sedan. Also, The document are for others Mercedes-Benz models: 2019 A- CLASS

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Display messages
Possible causes/consequences and M Solutions
Key Not Detected (red dis
play message)
R
You cannot centrally lock the vehicle.
#
Make sure that the SmartKey is in the vehicle.
If the SmartKey detection function has a malfunction due to a strong radio signal source:
#
Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.
#
Place the SmartKey in the marked space for star ting the engine with the SmartKey (/ page 130).
Á
Obtain a New Key
* The SmartKey needs to be replaced.
#
Visit a qualified specialist workshop.
Á
Key Not Detected (white
display message)
* The SmartKey is currently undetected.
#
Change the location of the SmartKey in the vehicle.
#
If the SmartKey is still not recognized, start the engine with the SmartKey in the marked space
(/ page 130).
Á
Replace Key Battery
* The SmartKey battery is discharged.
#
Replace the battery (/ page 67).
Display messages and warning/indicator lamps
497
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