Rusty brake disc?

[teslaboy]

Try it first, at least give Audi the benefit of doubt. Their not all bad....

 

[Matt2010]

Yeah they said if it persists, then call them again but it should be ok.
They sent a video from the workshop too with the mechanic saying what he'd done.

 

[Dan_DJT]

Rear brakes on mine go that rusty when I am away on work trips for 2-3 weeks and the car is sat. Takes a while to clear even with some full ABS inducing stops from v high speed. The rears dont do a lot of work on these cars

I would keep an eye on the disc surface and if it stays rusty then take it back to the dealer.