Thanks-Nulu for your expertise.I think you know what I am referring to. It is the extra [ driver side head] opening slightly behind the oil filter housing-is it an empty void, should it have a cover to stop things or water going in that hole. do I need to worry about the ATF I squirted-I saw no mounting bolt hole on the surface like the other side 's EGR. I looked thru whole garage and did not find any extra part. I think it is same forE320.