I'm going to be changing the oil and oil filter soon and was wondering if there are any things to look out for. I have never performed a filter change on these types of filters. Which bolt(s) do I need to remove to get to the filter element? I've got the Bentley manual for the E28, but it was not very clear. I feel like a nimrod even asking this, but I want to make sure I don't screw anything up. There are several bolts on the filter housing and I don't want to remove the wrong one(s).