E30 factory options, what do these options mean?

[Dj Buttchug]

interesting... didn't know they did double layer cosmoline

[LateFan]

0281 16" CHROME WHLS ROUND

ohhhh, you got the special wheels that are round! Lucky.

[Stanley Rockafella]

0281 means that once the tires are mounted, the diameter of the wheels is 16 inches

[nando]

0941 means an extra coating of cosmoline..

[noid]

0032 9576 100% PACK

0941 Special equipment handling
^^^ apparently this means that the car was ordered with extra wrap to protect during transportation to the dealer

0904 SPECIAL

0281 16" CHROME WHLS ROUND


What does 0032, 0904 reference? What 16" wheels is 0281 referencing?