I have not long ago brought a 16v and have a small consern with some dials. I have noticed that there are three dials set seperatly to left. Now I just wanted to now what each of them do as Only one of them moves (far right) and only one lights up (far left). What Im I to do with them. Should thety all be showing me something as well as being lite up? And any suggestions on getting replacement dials??