Sorry for the mess but just took a picture so you can see it in place with the mat
http://i176.photobucket.com/albums/w183/jaysnakeman/Mobile%20Uploads/586C7EB7-A8CC-48C3-B242-0D5CB9D5850D.jpg
I would definitely take a spare crank sensor mine died recently and was creating really erratic stating but if it failed completely you would be stranded. Cheap enough to keep a spare and easy enough to change roadside if needed
I had a similar sound last week, turned out to be one of my idler pulleys dying which then pulled the belt off, new pulley and new belt and it's running fine again
I'm having trouble starting my td5 90, I think I have a leak somewhere in the fuel system I've had a look at the fuel line and they have been rubbing but aren't obviously holed but I would like to replace these so I at least know they are ok and new but I can't find the defender td5 fuel lines...