What are common issues with Audi's Quattro all-wheel drive system?

I recently purchased an Audi with Quattro all-wheel drive, but I've been experiencing some issues with it. What are some common problems that could be causing this?

One common issue with Audi's Quattro all-wheel drive system is a faulty transfer case. This can cause uneven power distribution to the wheels and result in decreased performance and handling. Advice from experienced Quattro owners suggests getting the transfer case checked and repaired if necessary.

Another potential issue could be with the Haldex clutch, which controls the distribution of power between the front and rear axles. If this becomes worn or damaged, it can affect the Quattro system's function. It may be beneficial to have a specialist diagnose and potentially replace the Haldex clutch.

In some cases, the cause of Quattro issues may simply be a low level of transmission or differential fluid. This can be easily remedied by checking and topping off the fluid levels. It's recommended to do this regularly and as specified by the owner's manual.