I have a defender 110 TDi5 and it will somtimes just start to slow and finally cut out when driving along normally,if I turn it off and wait a minute or 2 it will then start and go away o.k. It can do this anytime under any driving conditions and it will probally not do it for weeks It can do it once or twice in short succesion or just the once that day.Has any one else had this problem