The three you need for the main model, namely:
1x4 tile grill pat
2x2 round tile grill pat
license plate
There are some photo's in the instruction booklet scans I used at peeron.com
http://peeron.com/scans/5541-1/17/
http://peeron.com/scans/5541-1/18/
edit: Oops, I seem to completely overlooked the other used stickers, it seems you need all of the ones on the scan Gerald linked to
1x4 tile grill pat
2x2 round tile grill pat
license plate
There are some photo's in the instruction booklet scans I used at peeron.com
http://peeron.com/scans/5541-1/17/
http://peeron.com/scans/5541-1/18/
edit: Oops, I seem to completely overlooked the other used stickers, it seems you need all of the ones on the scan Gerald linked to