I"d be willing to bet that, with that many codes, you have not seen the end of this. In any case, one thing that some forum members have had luck with, is going to Google and typing this:

"Mercedes SLK320 Pxxxx Code"

Insert your code in place of the x's. Posts on Benzworld tend to be very helpful in such cases. In fact, you will see a lot of RCM and SKREEM issues over there, same as here, but let Google find them for you.