Got my first jag an x type in 2011 then two petrol S types then an XF over two years ago got my partner an x type over a year ago and just got her a 2.7 d S type a few weeks ago which has the exhaust fumes coming into the cabin mechanic said it was intercooler pipe and I’m not sure that carries exhaust fumes ? the fumes are still there so it’s not fixed does anyone have any ideas please?