I picked up my black RS4 in October 2009 (2006/sat nav/Recaro seats/sunroof etc) and over the last few months have found this website invaluable - helping me with everything from correct tyre pressures to what I should expect from the MPG (lesson being not to own an RS4 if that’s a problem

As it is such a specialist car, I decided to finally join as I am sure I will have ongoing questions (but also want to contribute if I can help anyone).
A few (I am sure Newbie) initial questions if I may - Apologies if this information is readily available/obvious:
1. The Sat nav seems to think every starting point is Abergavenny (Which is nowhere near where I live). Whilst this amuses my friends, it does make using the device a little tricky. As it is a 2006 I am happy to get a new DVD (the one in the car does come out and is a copy), from the dealers at an eye watering £190 - but am not convinced this will solve the issue. Do I need any software upgrade? Does anyone know where I can get a manual - as I would like to rule out user error?
2. The breaks and discs were replaced 3000 miles ago at some expense - yet there appears to be a recent squeak when coming to a stop (only heard in the last few feet). The local dealer is happy to look at £120p/h (estimates 2hrs to take apart) but I feel this is more than a little steep - any (obvious) suggestions?
3. Is it normal when (as I pull away slowly) turning the wheel that you will feel a little judder? It feels like the rears tyres are pulling in a different direction. I have assumed this is normal as I have never owned a x4 wheel drive?
Ok - Essay over. Any help appreciated