Mercedes-Benz Mercedec-AMG GT R Owner's Manual page 405

402 Display messages and warning/indicator lamps
Warning/indicator lamp
Possible causes/consequences and
The tyres can wear excessively and/or unevenly.
R
The driving characteristics as well as the steering and braking may be greatly impaired.
R
You could then lose control of the vehicle.
Observe the recommended tyre pressures.
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Adjust the tyre pressure if necessary.
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Stop the vehicle in accordance with the traffic conditions.
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Check the tyre pressure and the tyres.
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