Mercedes-Benz GLS 2020 Operator's Manual page 530

528 Display messages and warning/indicator lamps
Driving systems
Display messages
Possible causes/consequences and
é
* ATTENTION ASSIST is malfunctioning.
ATTENTION ASSIST Inoper-
ative
é
* ATTENTION ASSIST has detected fatigue or an increasing lack of concentration on the part of the driver
ATTENTION ASSIST: Take a
Break!
Active Parking Assist and * Active Parking Assist and Parking Assist PARKTRONIC are malfunctioning.
PARKTRONIC Inoperative
See Operator's Manual
Consult a qualified specialist workshop.
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( page 238).
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If necessary, take a break.
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Stop the vehicle in accordance with the traffic conditions and restart the engine.
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If the display message continues to be displayed, consult a qualified specialist workshop.
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M M Solutions