It's Alcantara I'd imagine that hoovering and brushing it would probably be all that it needed but if you have got stains etc then you'd probably need something a bit more aggressive. Google came up with this post on tyresmoke :click me
hey John, i found this site really helpful with all things cleaning/detailing: http://www.cleanyourcar.co.uk/
the forums really good, they have "how to" pages for everything as well! it's a bit addictive though!! my car never been so clean.