I have a 2009 330d with the N57. I had the arch lines off today and noticed oil residue around around one of the intercooler pipes.
There's not a huge amount but it's not dry. Is it a major issue and how should I address this?
It's leaking between No. 3 in this image.
http://www.realoem.com/bmw/showparts...60&hg=11&fg=40