Thanks NHN - I have changed the volume and tone for the rear and fronts.
Here is my autoscan -
VAG-COM Version: Release 311.2-N
Chassis Type: 8E - Audi A4 B6
Scan: 01,02,03,08,09,15,16,17,26,36,37,45,46,55,56,63,76
Address 01 -------------------------------------------------------
Controller: 8E0 907 401 J
Component: 2.5l V6 TDI G000AG 0006
Coding: 02006
Shop #: WSC 63251
00006059 130 106LC150_1.V79142946482
No fault code found.
Address 02 -------------------------------------------------------
Controller: 8E0 927 156 R
Component: AG5 01V 2.5lTDI RdW 2222
Coding: 00001
Shop #: WSC 00000
No fault code found.
Address 03 -------------------------------------------------------
Controller: 8E0 614 517 A
Component: ABS/ESP allrad 3429
Coding: 04457
Shop #: WSC 06435
No fault code found.
Address 08 -------------------------------------------------------
Controller: 8E0 820 043 AB
Component: A4 Klimaautomat 1323
Coding: 00000
Shop #: WSC 63251
No fault code found.
Address 09 -------------------------------------------------------
Controller: 8E0 907 279 F
Component: int. Lastmodul RDW 0517
Coding: 01011
Shop #: WSC 63251
No fault code found.
Skipping Address 15-Airbags
Address 16 -------------------------------------------------------
Controller: 8E0 953 549 N
Component: Lenksáulenmodul 0611
Coding: 01042
Shop #: WSC 63251
No fault code found.
Address 17 -------------------------------------------------------
Controller: 8E0 920 950 M
Component: KOMBI+WEGFAHRS. RB4 D42
Coding: 01401
Shop #: WSC 00262
WAUZZZ8E54A237923 AUZ6Z0D0043239
1 Fault Found:
00668 - Supply Voltage Terminal 30
53-10 - Supply Voltage Too Low - Intermittent
Address 36 -------------------------------------------------------
Controller: 8E0 959 760
Component: Sitzmemory R2 F 0305
Coding: 00002
Shop #: WSC 63251
No fault code found.
Address 45 -------------------------------------------------------
Controller: 8E0 951 177
Component: Innenraumueberw. 0704
Coding: 00001
Shop #: WSC 00000
No fault code found.
Address 46 -------------------------------------------------------
Controller: 8E0 959 433 BC
Component: Komfortgerát T3B 1412
Coding: 08139
Shop #: WSC 63251
No fault code found.
Address 55 -------------------------------------------------------
Controller: 4Z7 907 357
Component: dynamische LWR D09
Coding: 00060
Shop #: WSC 63251
No fault code found.
Address 56 -------------------------------------------------------
Controller: 8E0 035 186 L
Component: concert II GRO 0001
Coding: 01203
Shop #: WSC 63251
No fault code found.
Address 76 -------------------------------------------------------
Controller: 8E0 919 283 A
Component: Parkingsyst. A4 RDW D08
Coding: 01114
Shop #: WSC 63251
No fault code found.
End -------------------------------------------------------