I've seen on the A1 Forum (which I have started to look in to because my wife has a new A1 on order) that on the A1 you can change the number of times the indicators flash using the Lane Change from 3 to 5.
The details given are:
• [VCDS] Indicator Soft Touch
• Sets the number of flash operations of soft touch turn signals
• Control unit "09-Central Electric">> "Adjustments">> "Comfort turn signal (Cycles)
• Adjustable: 1-5x
• Default value: 3 times
Does anyone know if this is the same on the A3.