Here's an interesting fact for everyone.
"Factory fit" sunroofs are not always installed at the factory
Someone I used to know once bought a brand new Ford Ka and specified an electric "factory fit" sunroof as an optional extra, the dealer explained that car would be supplied to the dealer from the factory without sunroof and the roof is actually installed at the dealer by a specialist who installs the roof and lowers the roof lining, etc. Apparantly this is common practice on models where a "factory fit" sunroof is available as optional extra.