Here you have all information about coding module 8P0 & 8P1 :
We use and prefer VCDS - Ross tech equipment
Defult coding - 0011822
# 77 (Phone)
Coding - Function 07
?xxxx: type (car)
0 - with CAN-bus (A2, A3, TT)
1 - D3/C6 High-System
2 - C6 Standard-System
x?xxx: type (Steeringwheel)
0 - non multifunction steering wheel
1 - standard steering wheel
2 - modular steering wheel
xx?xx: installed components
1 - none
2 - MFL
3 - HU
4 - MFL and HU
5 - K-line
6 - MFK and K-line
7 - HU and K-line
8 - MFL, HU and K-line
HU = Head Unit (i.e. RNS-D/E)
MFL = Multifunction Steeringwheel
xxx?x: language for voice control
0 - voice control off
1 - German
2 - English (UK)
3 - French
4 - Italian
5 - Spanish
7 - English (US)
8 - Voice control from external device (i.e. RNS-E)
xxxx?: Language for DIS
0 - no DIS display
1 - German
2 - English (UK)
3 - French
4 - Italian
5 - Spanish
7 - English (US)
#77 Adaptation 10
-> Channel 128 (Base Volume)
000 - 0dB (no increase/decrease)
001 - +1dB increase
003 - +3dB increase
006 - +6dB increase
128 - -1dB decrease
130 - -3dB decrease
133 - -6dB decrease
-> Channel 129 time after ignition off
000 - 30 Sekunden
001 - 5 Minuten
002 - 10 Minuten
240 - 20 Stunden
-> Channel 131 (Microphone Sensitivity)
000 - 0dB (no increase/decrease)
001 - +1dB increase
002 - +2dB increase
003 - +3dB increase
004 - +4dB increase
005 - +5dB increase
006 - +6dB increase
128 - -1dB decrease
129 - -2dB decrease
130 - -3dB decrease
131 - -4dB decrease
132 - -5dB decrease
133 - -6dB decrease
-> Channel 133 (BT)
BT activate/deactivate.
-> Channel 134 (handsfree)
0 - handsfree over BT
1 - handsfree only with mobile in cradle
-> Channel 135 (BT-PassKey)
default: 1234