Hi I have a UK-spec car and it is supposed to come with Hi-fi professional 677 with 16 loudspeakers. However it seems what I got is the Hi-fi business (12 loudspeakers).
This
link shows the position of the 16 speakers.
From the attached pictures you can see the tweeter/mid-range on the front door but i have nothing on my rear doors.
Anyone with option 677 fitted can help me to verify?
Thank you for all your help!