Hi everyone I hope this can be of some use to someone with roof problems on their 500c.My wife has owned one of these for about 18 months and after a few months the canvas roof began to make a whistling noise,after a period of putting up with this while lubricating and trying to cure it to no avail.Also we noticed that when the roof was retracted it didn't raise when trying to enter the boot space, we sent the car for a service and asked the Garage to have a look at the roof. they told us they put it through their Diagnostic checks and it seemed to be working ok,they couldn't find a problem.My wife picked up the car which after a couple of days their seemed to be more noise than ever.The next day I set about looking at it myself I had an idea of closeing the roof manually with the spanner provided in the boot and tightening the nut found in the roof of the boot space, this to my amazement closed the roof entirely,I left it like this for a few hours before trying it electrically this now works perfectly it even raises when going into the boot.I hope this helps someone.: