Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 529

Display messages
Snow chain mode Maxi-
mum speed exceeded
Active bonnet malfunction
See Owner's Manual
C
M
N
Possible causes/consequences and
* The maximum permissible speed for snow chain mode has been exceeded.
Drive more slowly.
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* The active bonnet (pedestrian protection) is malfunctioning or inoperative after having already been triggered.
Consult a qualified specialist workshop.
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* At least one door is open.
Close all doors.
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* The bonnet is open.
& WARNING Risk of accident due to driving with the bonnet unlocked
The bonnet may open and block your view.
Never release the bonnet when driving.
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Before every trip, ensure that the engine bonnet is locked.
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Stop the vehicle immediately in accordance with the traffic conditions.
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Close the bonnet.
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* The boot lid is open.
Solutions
M
P223 0288 02
Display messages and warning/indicator lamps 527