2000 Vauxhall Zafira ice

Electrical problem
2000 Vauxhall Zafira 4 cyl Two Wheel Drive Manual
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hi
i have a zafira w reg and sony mex bt 2600 conected to conects2 dops004 adaptor
this in turn connects to sony xa-110ip iopd adaptor ipod classic 40g

i get ids on the head unit but all i get on display in car is "aux" no ids etc

should i be able to get full tags through to display on car
any ideas please

radio tags ok and cd ok

not aux cd changer tags ?

also not related i get smell petrol on opening window cant find any leaks anywhere