Do you mean a Haynes manual? If so there is not currently one available for the seicento but the cinq is the same setup so use one of those!
If not and you meant an owners book, as in you dont have one or lost it, then they pop up quite cheap on ebay every so often, or nip down to your local scarppies and see if there is a breaking sei with one availble
The other thing you could do is post up your worries on ere, im sure amongst the cinqs and sei lot, we cud give you an answer!
Good choice, welcome to the forum and enjoy your sei!
Have a look at your local library, better still, if you are registered as an on-line user have a look for it from all your councils libraries and order it. ( hope you are lucky )