"integrierter MousePoint" and "Trackpad-Modul" were used on pages linked to from the first reference.

The second link uses "Moise-Point".

It is possible to see the "Moise-Point" device on some of the pictures on either page.

I have heared people using the term "Touchpad" instead of "Trackpad", too.

I cant imagine that the english phrase youve got is really "Track pad + eraser-head pointing device" But if you mean the pad on a notebook that you run a finger over to control the cursor instead of a mouse (the "Zeigereinheit", which could be a mouse or a digitizer pad as well) then the generic term is "Touchpad". Be warned that some of the bigger name-brands of notebook may have their own specific name for this item, so check with the manufacturer if possible (IBM call it a "TrackPoint"(sic)). Most PC terms dont get translated at all in German, you wont go far wrong simply using the English technical term or brand name.

The hard one was probably the eraser style pointing device, which is as difficult to name as it is to operate. AltaVista finds 278 German pages with mention of Trackpoint. TrackPoint may be a trademark of IBM (->ThinkPad).

Track pad appears to be a trademark of Cirque for a variant of their touch pad series. At least, I find Track pad only in connection with their devices on German pages. Trackpad, however, is found on 301 German pages in an AltaVista search.

You'll find a mention of both on page
http://www.swix.ch/swix/boards/computer/messages/456.html (not necessarily a proven and reliable source).

Cheers,
Marko