How does the Quattro system work in an Audi A1?

I've heard that Audis are known for their all-wheel drive system, but I'm curious about how it specifically works in the A1 model. Can anyone provide some technical details?

The Audi Quattro system in the A1 uses a hydraulic multi-plate clutch located at the rear of the gearbox to divert power from the front to the rear wheels when needed. It constantly monitors road conditions and can transfer up to 50% of torque to the rear wheels for improved traction and handling.