SteveB

Hi, I have a 2020 A1 S-Line Competition and every now and then the engine / exhaust noise deepens and my fuel consumption drops from around 40-45 mpg to less than 30 mpg. This last from anything from a few hours to a couple of days and suddenly the issue disappears. I have had the Audi inspect the car but as the issue was not happening at the time they couldn't find a fault. Has anybody else experienced this? Thanks, Steve