Hi all, just discovered an air leak in the bottom header of the intercooler on my 855 AWD, from a small hole about 2mm diam. which appears to be something deliberately introduced during manufacture [NOT a stone hit!] and is in the centre of a circle marked on the header. It may be something that should be plugged and the plug has come adrift, but why is it there and what should it be plugged with? Has anyone had this problem before, do they know what why it's there, and what has been done to fix it?