I would also like to inject that it is well documented the XF electrical systems are very sensitive to electrical (voltage) fluctuations. Just read all the posts on how this or that may be caused by a battery and that should be sufficient to imply that a huge power hungry stereo may spike any system with bad gremlins. Lately I have been thinking could a voltage stabilizer help keep some of these systems from being effected by load/rpm variations beyond the designed voltage regulator/charging circuit? Anyway, drawing lots of power on a line that has extremely sensitive electronic components might just be a huge no-no. The engineers only design these cars with the minimum requirements (costs go way up the more complicated/stout you make of anything). On the other hand, can a stereo system that has a manufactures defect cause any feedback to 'spike' the lines going back to the other systems (feedback of a different nature, a ground installed in the wrong place/connected incorrectly electrically)? Manufacturers building the XF would have to design filters and isolators above and beyond the alternators voltage regulator to prevent these things (remember the cost is factored into making the car) but dam, have you ever seen what a static spike can do to sensitive electronics? Time could be a factor in cases where a threshold of design specs are consistantly met or exceeded in operation of added or modified electric/electronic systems. Thats about all I can say about that (Forest Gump reference, lmao). Good luck!

sparkies, lawsuits are about $ and who is most convincing. Disclaimers don't work no matter how detailed they are because I have seen where judges award even with disclaimers because of the preponderence of the 'evidence'.