2003 A4 1.9TDI 130bhp 6spd manual owner here since 2007 the car has done around 160,000 and gets on average around 52mpg on my daily commute of around 40 miles on main road at approx 60mph. I’ve got cruise control which is class for a commute like mine plus great for long motorway journeys. Cloth seats (black) which in the back have had minimum use due to no kids. I use a seat cover which no doubt has stopped the seats from being trashed from daily use so I’d recommend them. The boot space in an A4 is disappointing in terms of biking & golf (I’d love it to be the same size as my mums old W reg A4 estate) however with the seats folded down it holds a huge amount of gear.
In terms of running costs apart from the twice a year oil change plus usual service & cam belt change it’s been pretty bomb proof with only a few things having gone a wry:
1) front demister actuator failed which was replaced with a part from a scrappy for €25 and done myself
2) rear window wiper motor went €100 odd and replaced myself
3) sensor went on accelerator pedal resulting in complete loss of power – again a good scrappy had the part for €30 and an independent garage replaced for €30
4) the boot mechanism can be a bit funny when the weather gets very hot and sunny but can be opened with the key. Again a good scrappy will get the part for a relatively small fee
I think that covers it.