Replace bulbs on the back light of the diplay. the black moulding have 3 holes in the top, just put something like a small screwdriwer intwo of the holes and pull towards you, it will clip out, loosen two torx screws on thee sides and pull the hole display unit fowward. Check witch bulbs is not used by the spesific model eg. the 16i petrol don't use the pre heating light and use that one or get some from the dealer. twist and replace.
Johanw
June 2009