Hello, This might sound like a really obvious question, but how do you check and top up the oil in the gear box? The user manual shows the nut on the side of the gear box. When I try to look I find that the I can't get my head cles enough to see anything! Also If I jack up the car then the oil level will not show correctly. I'm no mechanic but I would have thought that it should be quite easy to do. What am I doing wrong?!? The reason I want to check the oil is that I noticed some black colouring at the bottom of the gear box (around the join of the casing). Should I be concerned, worried or panicking.