Facelift Autohold on steep hill

Kery

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Joined
Nov 13, 2018
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ROK
hello

I bought A3 a month ago. I like this car but have an issue.

when autohold is activated on steep hill at a traffic and move the car again by push accel pedal, i hear grinding noise at the moment.
It works fine on flat road.
It seems i accelate the car while the breake still works which cause the grinding noise.
I push the accelation pedal slowly but it always make the grinding sound.
Is it normal?