Hi all i wonder if anyone can offer any advice regarding an issue i have with my 2017 a6 avant . I took it on a long trip at the weekend from Manchester to Portsmouth 247 miles the car did not miss a beat on the way there but it was a different story on the way back . 120 miles into my return journey i lost all acceleration i tried to overtake a middle lane hogger put my foot down and nothing foot to the floor and going nowhere fast . it is a manual car so i ended up using the gears just to keep going the slightest gradient on the motorway and i was having to drop gears to get up them . 120 odd miles later i finally got home turned the car off . About an hour later i took it out and all was back to normal . Whilst all this was going on there was never any warning lights on the dashboard i scanned it for codes but no issues found . Any help would really be appreciated . I have only had the car 3 weeks and this is taking the fun out of it