Audi Q5   Controls   Instruments and warning/indicator lamps  Warning and indicator lamps
Do not exceed max. engine speed of XXXX rpm
There is a malfunction in the engine management system. In addition, the indicator lamp in the instrument cluster will light up. The engine speed will be governed to the speed displayed in the driver information system. Make sure that the engine speed does not exceed the speed displayed in the driver information system, for example when shifting down a gear.
Drive to a qualified workshop without delay and have the fault rectified.