Hi, I’ve had my A6 2.0tdi ultra for going on 18mths now, when I first got it it was doing well over 50mpg no problem, recently it is a struggle to get it over 40mpg (all my driving is rural on open roads and cruising along in 7th gear at 60mph) the car is regularly serviced etc, I have noticed that the s-tronic is due a service in the next 3k miles, I’m wondering will this have any effect on improving fuel efficiency?? Anybody else have an ultra doing similarly poor mpg??