This is a T5. I know the oil filter is inset into the oil pan but was wondering....what is the (black) canister filter that is toward the passenger side of car right behind the front bumper? The top of the filter points down....can't miis it when you look under the front of the car. ALSO..... Can the front pads be inspected with the wheel on? From the drawings, it looks as though the pads themselves are more of a square shape and are hidden from view from the much larger calipers? I can't seem to get a handle on checking their condition. Does the wheel need to come off? THANKS KINDLY.