Mercedes-Benz AMG GT Operator's Manual page 454

Display messages Possible causes/consequences and
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:
Switch off the vehicle.
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The electric parking brake will be applied automatically.
If you do not want the electric parking brake to be applied, e.g. at an automatic car wash or when the vehicle is being
towed, leave the vehicle switched on. This does not include having the vehicle towed with the rear axle raised.
If the electric parking brake is not applied automatically:
Switch the vehicle off and switch it back on
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Release and then apply the electric parking brake manually (
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If it is still not possible to apply the electric parking brake:
Consult a qualified specialist workshop.
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Solutions
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Display messages and warning/indicator lamps 451
page 210).