The Audi A6 is a luxurious mid-size sedan that is highly sought after, but previously only available at a premium price. However, its starting price of $58,100 makes it the most affordable German luxury option in this segment. The A6 comes in three trims: Premium, Premium Plus, and Prestige, with the numbers referring to engine options and equipment levels. The two engines available are a turbocharged inline-four and a turbocharged V-6, both of which deliver decent fuel economy. According to the EPA, the inline-four gets 26 MPG combined, while the V-6 gets 25 MPG combined.
Additionally, the BMW 5-Series is another option worth considering, with a starting price of $58,200, just $100 more than the A6. The 5-Series comes in three guises, each referring to performance elements, and features three engine options, including a turbocharged inline-four and a turbocharged inline-six. Both engines are paired with a 48-volt electric motor and deliver decent fuel economy. Ultimately, the A6 offers a more affordable entry point into the German luxury mid-size sedan market, but the 5-Series offers its own unique appeal.
Source: https://www.topspeed.com/most-affordable-luxury-mid-size-german-sedan/