Oil Build up on Pipes - AOS / Throttle Body / MAF

[00boxster]

Ive had my ride a 2000 Boxster Semi Auto for about a year now and finally took a look at the engine.

Attached are the two pictures showing oil build up over pipes A and C. Does anyone know if this points to any problem in particular like replacing the AOS or cleaning the throttle body.

The Durametric error codes are as follows;
Error Codes P0102 P0107 P1126 P1133 P0300 P0302

Also is the throttle body shown in the picture labelled D as I will most likely open that up and clean it with CSR CO Contact cleaner which I think is also ok to clean the MAF with? Can anyone confirm that?

[j.fro]

"A" is the oil filler tube, which is known to crack and cause a vacuum leak (and get oil all over, like it has), throwing some of the codes you are showing. I believe there is a Porsche Technical Service Bulletin for this.