Coding table up to m.y. 2001
| 5 | 4 | 3 | 2 | 1 | ← Decimal places of byte coding on tester display | |||
| 7 | Radio configuration | |||||||
| Antenna with remote power supply | CD changer | Secondary display | ||||||
| 1 | X | - | - | |||||
| 3 | X | X | - | |||||
| 5 | X | - | X | |||||
| 7 | X | X | X | |||||
| X = component installed | - = not installed | |||||||
| 5 | 4 | 3 | 2 | 1 | ← Decimal places of byte coding on tester display | |||
| 1 | Sound system adjustment | |||||||
| Type of adjustment | ||||||||
| 0 | Standard (i.e. not BOSE sound system) | |||||||
| 1 | BOSE sound system | |||||||
| 5 | Number of passive loudspeakers | |||||||
| Number and Locations binder | ||||||||
| 2 | 2 passive loudspeakers (front) and 2 active loudspeakers (rear) (Standard for "Concert" radio without BOSE sound system) | |||||||
| 5 | BOSE sound system for Audi TT (fader OFF for sound matching) | |||||||
| 5 | 4 | 3 | 2 | 1 | ← Decimal places of byte coding on tester display | |||
| 0 | Sound matching | |||||||
| 0 | Standard | |||||||
| 0 | Country identification | |||||||
| Country | ||||||||
| 0 | Standard | |||||||