serpintine belt/cooling system leak

I can't say if the belt and the black smoke/coolant leak are related but I would say don't drive it, tow the car to a Jaguar specialist. Besides a coolant leak putting your engine in jeopardy, black smoke makes me think of something burning and could be a safety hazard. Here's a directory link for you: http://repairpal.com/jaguar-repair-in-morro-bay-california