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BTW - G92 is the 3.15 performance axle on the A4 transaxle and 1SB is an option group that groups most of the goodies like HUD, and memory package together.
G92 is the performance axle option for automatic cars. It uses a 3.15 rear end ratio instead of the base 2.73. If your car is a 6spd, this isn't applicable.
1SB is an option package, and the contents of which will vary dpending on the year of your car.
From 2003-up, it is the "loaded" package with all the goodies...HUD, power pass. seat, memory, etc.
On the 2002 and older cars, it was the mid-level option package, and 1SC was the loaded package.
http://idavette.net/facts.htm and click on the year of your car (if 02 or older) to see what exactly was in these option packages.
Up through 2000 model year, GM didn't offer 'packages' like 1SB - all of the options were a la carte until 2001. In 2001-02, 1SA was the base model, 1SB was mid-line, and 1SC was "loaded." In 2003-04, 1SC was reserved for the Anniversary and Commemorative Editions, and 1SB became the "loaded" package.