Hello Penny,
I'm very much with Fast Edd on this and I too believe it is up to you to decide what you want to do about with Your car. If you take a simplistic view and ask yourself if you are happy with its current running and performance (which it seems you are), and if from what you read, you are likely to risk it becoming worse rather than better by accepting the recall, then I see you have the right to leave well alone.
If it were mine I would do as Edd suggests and totally ignore these alerts and see what happens. I wouldn't take any risk of taking this 7 year old car anywhere near an Audi dealer, who could well ignore your dictate and just do it and argue about it after. Perhaps think twice about even taking it to an Audi independent, but preferably entrust your servicing to a trusted local garage.
Kind regards,
Gareth.