I've just come across a "common known problem" with the 335d's which is the red boost hose going to the intercooler being covered in oil due to the seals failing. After a quick inspection under the bonnet its pretty clear my own car is suffering from this problem aswell... Just wondering if you could give me a rough quote on replacing this hose and seals, its a very common problem with this model so im sure your mechanics would have seen it before, there was a PUMA case raised about this issue.
11617812274 - charge air line ( flexi red hose)
11618506786 - top seal ( for flexi red hose )
If you click this :
you will see the parts in question Items 1 & 2
Its also due for a rear brakes service soon too....