DB11 - Grinding noise in Sport + mode

[gbob14]

I recently bought (my first sports car) a DB11, about 4 months ago from the dealership. Unfortunately its spent a a fair few of those week in their workshop, trying to rectify some niggling issues. One being a lot of wind noise coming from the drivers side window, they replaced the rubber gasket, which has massively improved the noise... however this is still making noise over 50 mph... So was a little disappointed this hadn't been sorted.

One issue I had noticed before the car went in to be looked at which i'd flagged. When driving the car with the window down, when accelerating from 0 to around 30 there's a slight grinding noise, then when letting off the accelerator there is a slight springy 'eep' sound. However this only seems to happen in Sport + mode. When driving in GT mode, its dialed down a lot. I was wondering if this was a characteristic of the DB11, or a known issue.

Aston said it was 'driving fine'. But for a car of this ilk, I don't think this sound is normal.

Am really keen to hear your guys opinion on the issue