My car is fitted with a non standard system, Clarion with a refernce number I can t remember and optional sub woofer.
The thing works with USB, Ipod, bluetooth for mobile and has a folding screen for GPS
There are two speakers in the doors, two in the boot and two above the windscreen
It works quite well in my view and I am quite demanding on that front, having a nice system home and in other cars
Did you specify the Clarion?
I assume the stock AeroMax stereo is the Blaupunkt one that MMC fit to the Aero?