The 3.0t is more reliable than the 3.0 tdi in my opinion. As an former vw audi technician (over 10 years) I find this to be true of most VAG gas vs tdi engines . In general TDI is more expensive to fix due to repair times and part cost. The newer TDI's are just more complex and have more systems to fail than the similar gas counterpart mostly
The stonkingly torquey 3.0-litre BiTDI model - its twin-turbo V6 diesel producing 316bhp and 479lb ft - continues service, and is arguably a stronger real-world proposition than the S7. But there
The Audi TDI has great performance and rides much-much smooth than the MB GL550 did. both options are aftermarket and both options increase reliability and drivability making it far more
Not had the car long but reliability is to usual Audi standards. 2.0 TDI Quattro 184 S-line Plus. Year. 2016. Avg annual mileage. 10,000 – 14,999. Owned. Less than a year. Bought Car. Used. vqUmr8.