Gotta love that German to English translation - or the German terminology - or both!
"Desk Pad"
BTW - another place the PET uses "desk pad" is for the side mirror gaskets/seals. I'll take a pic & add those when I get a chance.
Apparently they use whatever "desk pad" is in German for a flat rectangular seal or gasket.
Sir Andy or Wolfgang/Gustl may be able to clarify more on this language issue?
Glad to see you put the proper English terminology in the title bar Jim!