Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 540

538 Display messages and warning/indicator lamps
Display messages Possible causes/consequences and
The electric parking brake could not be applied or released.
Switch the ignition off and switch it back on.
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To apply:
Release and then apply the electric parking brake manually (
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To release:
Apply and then release the electric parking brake manually.
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If it is not possible to apply the electric parking brake or the red ! indicator lamp continues to flash:
Do not continue driving. Consult a qualified specialist workshop.
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Where necessary, also secure the parked vehicle against rolling away.
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* The yellow ! indicator lamp is lit and the red ! indicator lamp flashes for approximately ten seconds after the
electric parking brake has been applied or released. It then remains lit or goes out. The electric parking brake is mal-
functioning.
If the state of charge is too low:
Charge the 12 V battery.
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To apply:
Apply the electric parking brake manually.
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Solutions
M
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P223 0288 02
page 218).