Can't recommend anywhere but can recommend against the Alto dealership at Artarmon, nothing gained for getting 'official audi servicing' other then an expensive bill and the need for multiple visits to get everything fixed.
* Update * Have since been to Jax in Mosman and would recommend them. Whilst it wasn't a cheap service the work was well explained and has fixed things that I now realise were needing repair for some time - the car now feels a lot better to drive! No pressure upselling and a friendly attitude, I'll be heading back there.