How can I access behind Control Panel of Hotpoint EW81?

........(i.e behind the panel with knobs, clock etc on front of top oven/grill.) The temperature markings behind the control knob for my main oven are stuck so I have no idea what temp the oven is. I remember a repairer fixing it once before & it's just a case of re-aligning &/or refixing the little plastic collar with all the temps on it. BUT.........I need to know if it's poss to access it without stripping down the whole cooker! Any suggestions very gratefully received.......