Well, took the car to the dealer today.

One of the mechanics had a look at it.
He said the oil came from some hoses which goes to the oilcooler.

Nothing serious he told me, had seen it before. They ordered some new
hoses and will put them onto the car in 2weeks time.

He then topped the oil, told me I could drive in the meantime, and that I
should have an eye on my oil level.

Thanks for your thoughs.

TommyE