I have a bulb out on the dash clocks of my X5 - i have got the clocks out but there appears to be a plastic casing on the back stopping you reaching the other bulbs - there are no screws holding it in place - just some plastic cross shaped things which dont seem to budge - i dont want to break it - how do you remove this plastic panel at the back of the clock to access the other bulbs at the back panel?? Cheers