AUX-IN on the head unit of AlfaRomeo
(A head unit made in Blaupunkt ,for Alfa147 and Alfa156)
At first AlfaRomeo's head unit(made in Blaupunkt) does not have AUX-IN.However,you can add AUX-IN by two next methods.

1.When your car has CDC, use Audio Selector.
Fig .1

CDC
iPod
Navigation
etc.

CDC

TEL
&
Handle
Re-Cont.

BOSE
AMP
Cont.
2.When your car does not have CDC, attach a switch like figure 2.
Fig.2
Because the output is low in the case of iPod, it is needed the amplifier .
I use Belkin Auto Kit for iPod as an amplifier and a power supply.
In case of Alfa,probably a CDC protocol of Blaupunkt is compatible with C-bus(Cralion).(CDC of Alfa156SW is made in Clarion.)
You can use a connector of CDC and make AUX-IN.
Head Unit accepts the input from CDC if you jump DATA-IN and DATA-OUT.

Attention:
A choice method of AUX-IN

When use AUX-IN

Operation order

1. Switch off HeadUnit
2. Switch on the switch of Fig.2
3. Switch on Head Unit
4. AUX-IN use is possible
Power to Belkin(iPod)
Audio

When use CD of HEAD UNIT

Operation order

1. Switch off HeadUnit
2. Switch off the switch of Fig.2
3. Switch on Head Unit
4. CD use is possible
Switch
Sorry to say this IS'NT responsible for your result!!

writen by Ken ,in Japan