The problem here is, most of the options the Sports Package adds/added to the
A4 were/are avaliable on their own. The rims are/were avaliable through Audi's
"Collection and Accesories" catalog, so are stainless steel exhuast tips &
entire exhuast system upgrades, aerodynamic "body" kits, shift *****, and
Eibach performance/lowering springs that're actually *better* than what Audi
offers in the normal sport pack. The Sport Steering wheel and seats can be had
as options too if I remember correctly, the dealer just has to request the car
that way from Audi. There's a chance that the previous owner of your A4 ordered
an A4 with the sport seats and steering wheel, than added his own favorite 17"
rims and Eibach springs from the catalog. Beyond that, I know that up untill
98', even sport pack equipped A4s were getting 16" rims. Check to see when Audi
started offering 17" rims as part of the sport pack.