From the 2018 broshure it looks like it is only in the City Assist pack. Front pre-sense is standard, but rear only with pack.
This is the City Assist info and has 3 parts:
Audi Side Assist
When activated, the system aids the driver
when changing lanes. Audi Side Assist
monitors the area behind the vehicle,
using radar sensors located discreetly in
the rear bumper, informing the driver with
a visual warning signal in the door mirror
if there is a vehicle in their blind spot or
approaching quickly from behind
Pre-sense Rear
Monitors vehicles following from behind,
and if a potential collision is detected,
the driver is first warned visually via
a flashing light. Audi Pre-sense Basic
measures (e.g. closing windows) are
initiated and then if a collision is
unavoidable, the system will tighten
the front seat belts. The system is
deactivated when towing
Cross Traffic Assist Front
Within system limits, warns the driver
of traffic crossing in front or to the side
of the vehicle, using vehicle sensors.
The system first alerts the driver visually
and then acoustically via the MMI. A brake
jolt is applied if a potential collision is
detected. The system can also assist the
driver at crossings and exits with poor
visibility, and warn against a possible
collision with oncoming traffic detected
from the side
