From the Neff Manual under the section entitled "End of program"
"The end of program is indicated by a buzzer. This function can be changed as follows
Hold down the time delay programme button and switch on the main switch, then release the buttons. The time delay button flashes and the digital readout indicates the value 2 (loud) which was set at the factory.
To change the setting press the time delay programme button. Each depression of the button increases the set value by one; when 2 is reached, the display jumps back to 0 (off).
Switch off the main switch and the set value is stored in the appliance"
Hope this helps....mine has been driving me nuts for years. Thought I'd read the manual back to front and had never found anything. Then just two nights ago I had to read the manual again for somethign else and this jumps out at me, DOH!
Pete
March 2008