telephone BENCH KH 5001 -operating instructions. / Intensify the data in th?

Dears Sirs,
we are very sorry, because we have lost the operating instructions of our telephone KH 5001. Could you please send us another copy of these operating instructions in german or spanish language either as paper copy to our home address :'Hildegard Werner, Trav. del Pi 38, 43007 Tarragona/Spain, or as electronic document (pdf) to our email address " hilwerner@hotmail.com ".

We have another problem too. The data on the screen or display is too weak or faint to be read. We have chected, that the batteries are new. Nevertheless we cannot read the letters on the display, even using the bottom for intensify the contrast. Could you give us, please, a piece of advice to solve this problem?

Thank you very much for your help. Yours faithfully
Hildegard Werner