To pause the CD press
TP.
You couldn't figure that out? 
Actually the radio is a bit screwy. It is the same logical thought process that says that
RP is for
shuffle CD. I should give Becker a break. It's likely that these obscure abbreviations make more sense to the Germans.
The owners manual has a complete, albeit vague, instructions for the radio/CD. Also check out various post on this board. There are also several PDF files, etc. online. Check links in postings or do a Google search.