Is clean all underneath the engine with some old rags and get it as clean as you can.
Then if your outside, put a sheet of light coloured polythene or similiar under the engine area and use stones to weight the corners.
if its in a garage use sheets of newspaper.
Then report back with the findings.
ps// the American site isnt much use for your car,....as very few Euro M3s made it over there (compared to the number of inferior US ones!)