Audi TT Coupé Controls and... Instruments an...  Warning and...
The indicator lamp monitors the safety systems and the pedestrian protection system.
Safety system
If the indicator lamp lights up or flashes, there is a malfunction in one of the safety systems.
Drive to a qualified workshop without delay and have the fault rectified.
Pedestrian protection system
If the indicator lamp  lights up or flashes and the bonnet is in a raised position, the pedestrian protection system has been triggered. Please refer to link.
WARNING
Have the safety systems examined without delay; otherwise they may fail to trigger in an accident – this could result in serious or possibly fatal injury.

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