A6 V6 TDI Quattro: Common Problems & Issues

Hello everyone,

I'm considering buying an Audi A6 Quattro with a V6 TDI engine and a 6-speed transmission (1.5 years old, approximately 30,000 km). A mechanic friend of mine (from an independent workshop) warned me about potential issues with this car, such as problems with the drivetrain. Has anyone else had similar experiences with this car or engine (either firsthand experience or heard about it)?

What do you think about a price of €31,500 for the car (the original price was €48,330)?
is very well maintained.

Thank you in advance for all your answers!