From mountain pass to unpaved trail. In the Four Altitudes Challenge, Tom Klocker relies on the Audi A6 allroad to handle changing alpine conditions with confidence. #Audi #VorsprungDurchTechnik #A6allroad ----- Audi A6 allroad TDI quattro: Fuel consumption combined: 6.4-5.8 I/100 km; CO2 emissions combined: 167-153 g/km; CO2 class: F-E.