What is the difficulty level of accessing a 2004 S80 head unit for speaker connect? thanks for any help

 

well that depends if you have ever taken apart a dash before, it require patience and trial and error, go to mathews volvo site to fin instructions on stereo removal, not too hard but plastic can brake so be careful

 

If it is anything like the 99 model your remove the bezel around the gearshift (use a soft plastic bondo card or something) there will be two t25 torx screws holding the ac controls and a couple more holding the head unit in place. PM me if you need any more help. Shouldnt take more than 30 mins tops.