Yes the squeal is most likely to be the release bearing. Adding that to the high bite point confirms that the clutch is defective and needs to be renewed.
Others here may be able to recommend a source for a new clutch.
The fans should only run when the temperature is high. I believe there is a module that controls the fans which you may need to renew, but I do not know the details, so a first step would be to get it tested.
David.
It might help if you gave a more detailed explanation of what you mean by lumpy power delivery, along with conditions at which it happens. Conditions like engine speed, hot or cold, load, service history, state of tyres, etc.
Gary.
I have no doubt there is an electronic fault of some kind and therefore the error messages are all meaningless. I suggest you find an auto electrician.
I can just about hear the noise in the last three seconds of the audio, but it is so overwhelmed by engine noise that I have no chance of identifying it.
James.
The distinction between remanufacture/rebuild/repair is almost nonexistent. They all amount to exchanging worn parts for new.
I believe you have two choices. One, go to Audi and pay a large fortune for the repair. Two, find a specialist gearbox repair company and only pay a small fortune. Don't be tempted to buy a secondhand unit and least of all don't buy one from Ebay.
If the fuel tank is steel there's the potential for a lot of rust to have formed in it during 12 years of inactivity. If it is possible, which I do not know, I would want to remove the tank and vigourously slosh a gallon of fuel around before pouring it from the filler neck, then repeat until no more rust is seen. The fuel guage will have to be removed so that is the ideal opportunity to test it.
If the tank is plastic there will naturally be no rust, but there may well be condensed water which needs to be removed somehow. I doubt there is a drain plug so maybe a syphon pump down the filler neck would do the job.
It's only condensation and nothing to worry about. Water vapour is formed during combustion which then condenses in contact with cold steel. It will be worse in cold weather and will disappear when the exhaust system is hot.