Sorry to hear of your problems
My 08 Dooper went back all last week with the stop/start not always re-starting, but they replaced a part and its been ok *touch wood* (not to mention the 6 other times it had been back in the workshop

)
The noise your getting, sounds like its the cooling fan, does it sound like a Hovercraft?? If so, I (and many others) have been told this is perfectly normal, although highly embarassing!
