Cleaning MB fabric

I would try white vinegar to start with. I used white vinegar on mine (also a pale green one) to get off some grubby marks before I sold it. White vinegar works on mould but you need to leave it on a while to take action, so I would soak the mouldy area and then leave it, even until it dries out, and then use some more and a cloth to get rid of it. Hopefully it works, parking it out in the sun might help also. Exit mould etc would probably bleach the material but someone else might have another suggestion.