Hi, I am currently looking for something like this

2001 BMW X5 STEPTRONIC E53 Private Cars For Sale in SA - carsales.com.au

as a run around and just have a few questions about it.

Do all the V8's come with GPS?
Are all of the V8's Steptronic?
What is Steptronic, it is also noted on some of the e and 5 series.

Any help would be great fellas.