How does the Audi A6's Quattro all-wheel drive system work and is it worth the extra cost?

I'm considering buying an Audi A6 and I keep hearing about the Quattro all-wheel drive system. How does it work and is it worth the extra cost compared to a front-wheel or rear-wheel drive car?

The Quattro all-wheel drive system in the Audi A6 uses a center differential to distribute power between the front and rear wheels. This allows for better traction and handling, especially in inclement weather conditions or on uneven terrain. Many owners swear by it and believe it's worth the extra cost, but ultimately it depends on your specific driving needs and preferences.