What are you going to install into your Audi Q3 (8U)*
(we need this information to establish the correct parts needed)?

Is my Audi Q3 Low Version (RMC) OR High Version (HN+R)?

Frist check to see if your car has original navigation (OEM GPS) or not.

Usually, if the car has "HN+R " in the MMI setup menu, it contains factory navigation (MMI 3G+ High version).

If the car has "RMC" (low version), normally it doesn't have an original navigation system.

Their power harnesses are also different (As shown below)