From a German DSM-Explorer its not possible to get access to German Help. Clicking on Explorer help opens english documentation.
Below is the link getting opened instead of German Documentation.
But I even can't switch to any other language from that point.
Release : 1403
Component : DESKTOP MANAGEMENT SUITE
This is a known issue in ITCM 14.0 SP3 . Please raise a case with support and request test fix T5IZ447