Trending Audi Cars. The Audi A4 comes with a tank capacity of 63-litres in petrol variants while in diesel models it offers capacity of 70 litres. A6 (C7 Platform) Discussion - IE: Ad Blue Fault Alarm and Engine Check Light - Hi, I have a 142 audi A6. Recent got ad blue maintenance alarm followed with engine check light. Fault occurred 200km after topping up ad blue. What is AdBlue and what does it do? 'Diesel exhaust fluid' explained If you own a diesel car built after September 2015, the chances are it’ll need AdBlue at some point. As soon as the EU implemented the Euro 6 emissions standard in 2015, it became necessary. AdBlue is as essential to your car as petrol, therefore without it, it cannot function. When there are approximately 1,500 miles of fuel left in your tank, a dashboard warning light will turn on. AdBlue is an exhaust fluid, not a fuel additive. It's stored in a separate reservoir and is topped up via a (usually) blue filler cap located either next to your fuel filler, in the boot or under the bonnet. It's a trade name registered by the German car manufacturers association, but is the most recognised form of Diesel Exhaust Fluid (DEF). 2015 Audi A6 C7 3.0 Tfsi [1.49] Profile ETS2 1.49.2.15S by Rodonitcho Mods. add max fuel tank capacity up to 2500 L for All Truck with optimized Adblue Tank Capacity. How much AdBlue does Audi A6 use? Audi reckons AdBlue consumption is about 0.5%-2.5% of diesel consumption. But in real-world terms, we used 15 litres over 550 litres of fuel. That’s about two litres of AdBlue for every tank of diesel. So how do you go about refilling the Adblue? The car is a Audi A6 2.0tdi C7.5 with the dreaded adblue system. I have had the car for 18 months twice it came up with the 1500 miles adblue level warning and i topped it up each time it took a full 10 litres. I have done around 13k miles in the 18months. About 2 months ago the 1500 miles count down popped up on the dash so i went to fill it up. I am not aware of a way to make the AdBlue / SCR level appear on the dash or MMI but this vehicle uses a separate diagnostic capable module for that function: > Address AC: Reductant Control (J880) Labels: 4G0-907-355.clb. > Part No SW: 4H0 907 355 D HW: 4G0 907 355 B. > Component: SCR-Stg-G2 H10 0012. > Revision: 00000000 Serial number: 150300576. Detailed specs and features for the 2022 Audi A6 including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. Used Audi A6 2015 LrBvpUU.