Have a 2008 Grand Cherokee Overland Diesel and in the last 18 months the radio/ nav system has been shutting it self off ( black screen ) after a few minutes sometimes I can turn it back on and other times I have to wait longer. It has been to the dealer and was updated before Christmas but I don't think that fixed it as it died on my wife 3 times on a drive between Ottawa and Montreal on just last week. ( total trip home to destination about 12hrs but just had atitude between Ottawa and Montreal ) Does anyone have any idea what could be wrong
Thanks