Hi, my first post, which I'm embarrassed to ask! I am partially disabled and have just bought a new Smart ForFour as it seemed to suit my needs (which, so far, it does!). However i wanted to check the oil and feel that maybe I'm being dim, as it seems so difficult. Lifting the base of the boot I am faced with the engine cover and and 5 cross-shaped 'nuts' each with a Phillips screwhead. (too large for any screwdriver I have!) Can I open them? Can I heck? I must be missing something, right? I can't believe I have to struggle through this procedure every time. There, I said it was embarrassing...