Well it looks like my Biturbo project will have to wait a bit longer as I think I need to spend some more money on the Q4.
The first item on my list is to change the gearbox oil. I went for a drive today and something doesn't feel right, it changes gears ok but it's not as smooth as it should be and in the lower gears there's an audible 'clicking' noise. It sounds quite cool, like changing gear in an old racing car

but I don't think it's suppose to do that! After spending some time on google, I think my gearbox oil choices are Tutela Technyx 75W-85 or Pentosin G4 SAE 80W.
I have also planned to have a stainless exhaust made for the car but I have been delaying this. Well, I think this needs to be fitted sooner rather than later, the exhaust is leaking at the downpipes and it's making all sorts of noises now. I can't live with it any more

it's a shame as I like the current noise of the car (apart from the leaking noise obviously) but I guess a stainless exhaust can only be a good thing.
I have also mentioned the fact that the clutch needs to be replaced in the next year. If changing the gearbox oil doesn't 'fix' the gearbox I'll probably have to fit a replacement gearbox at the same time. I know of a few places I can get one, but this will not be cheap
There's also a brake fluid leak I think, I monitor the car's fluids closely and the fluid level in the reservoir is very slowly falling. The coolant and engine oil are always fine though.
Other non-mechanical jobs coming up this year include:
Fitting my Zender Milano wheels and lowering springs
Fitting a Zender rear spoiler (courtesy of Alfan

)
Replacing the instrument cluster with a correct Q4 item. This means it will use KMs whereas I need MPH, but it also has the correct layout for the warning lights!!
...And probably many other things I have forgotten about!