; Audi A6 2nd Gen (C5/4B) Original radio options - InCarTec

There are multiple original radio options in the Audi A6 2nd Gen (C5/4B), which option is the original fitted system?

Audi A6 Navi Plus RNS-D Audi A6 Navi Plus RNS-D
Audi A6 Navi Plus RNS-D BOSE Audi A6 Navi Plus RNS-D BOSE
Audi A6 Navi Plus RNS-E Audi A6 Navi Plus RNS-E
Audi A6 Navi Plus RNS-E BOSE Audi A6 Navi Plus RNS-E BOSE
Audi A6 Symphony II Audi A6 Symphony II
Audi A6 Symphony II BOSE Audi A6 Symphony II BOSE
Audi Concert Audi Concert
Audi Concert BOSE Audi Concert BOSE
Audi Concert I CD BOSE Audi Concert I CD BOSE
Audi Concert II CD Audi Concert II CD