Miele CVA 7840 Operating And Installation Instructions page 66

Cleaning and care
 Carefully pull the stainless steel cover
off and then clean it.
 Release the milk pipework from the
dispensing unit: to do this, pull the
lug  to the left.
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The connection piece in the milk
pipework should not be removed.
Clean the connection piece, if
necessary, with the cleaning brush.
 Hold the dispensing unit on either
side and pull down to remove it.