So, here we go. Are you having trouble folding your convertible roof? Will the horeshoe not close properly - particularly on power hood versions?
The chances are that the problem is caused by the tensioning straps folding themselves the wrong way - probably as a result of them being jammed in the horseshoe at some point.
Anyway, Does your roof look like this when it's folded?

Or maybe this?

In both photos, you'll see the loops of the tensioning straps - circled in the bottom picture. Both of these are wrong.
This is how the roof should look when folded

This is the same roof as the first picture just a few minutes later with the tensioning straps fixed.
How do we get from picture one to picture three?
All you need is a pair of pliers.
Here's the same roof in the middle of its folding operation.

See how the straps are folding out away from the roof and not hugging in close to the canvas? That's your problem right there. These tensioning straps have wire running through them to preserve the shape and the wires in this roof have somehow been bent or moulded into the wrong shape.
So get your pliers out and bend and crimp the wires so that the straps fold inward towards the canvas like so:-

Now, instead of folding away from the canvas, the strap hangs in towards the canvas

And the roof folds perfectly

One of the simplest, most rewarding jobs you can do on your car.