159 2.4 20007 plate
19,500 DPF/EGR by
AO Silver Member
Join Date: May 2009
Location: United Kingdom
Yes, but it probably won't work as well as you would like and you will still probably end up needing the adaptor.
The way the switch live works is a bit weird and relies on canbus input to trigger it. You can adapt the wiring to give the unit permanent live but I found that flattened the battery on my wife's 159 and that is the same as the Brera.
You will definitely (100%) need the adaptor if you want steering controls as these are canbus not just giving a voltage trigger as earlier cars like the 156 etc. does.