If the hydraulic power steering hose leaks, it could cause reduced or complete power steering failure.
This may lead to hydraulic fluid leaking into the engine compartment and igniting a fire if it comes into contact with hot components.

https://www.productsafety.gov.au/recall/audi-australia-pty-ltd-audi-a8-4h-my2010-2013-and-a8-4h-security-my2012-2016-rhd-with-v8-w12-petrol-engines?fbclid=IwAR0Ln8jcAwd3Bl8RM-VvzTCOC0HbJC6JHUjphS_60mYYVaC5DnVt7Gcr2lk