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There are some dual flush cisterns where you have to depress one button to reveal a cavity in the second button. Put a screwdriver in that cavity to left out the second button, then release the first button and pry that out.
Underneath the buttons is a screw which must be unscrewed to release the cistern lid.
Not sure if this will apply to you... but if not, good luck anyway.
Duravit... | Answered on Dec 03, 2016
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