BlytonboySteve

Hello, my first post!
After having very bad experiences with 2 online manual companies could anyone please tell me if it is possible in the UK to purchase a traditional hard-back copy of a manual for a 2011 E250 CDI AMG Estate please?
I have an engine fault code (P0123 possibly?) which is Throttle Position Sensor which I'm led to believe is in the throttle body and cant be replaced without the whole body? I need to be able to access this to try to clean the wiring or replace the sensor or body but would prefer some pictures and text to be able to complete the work. Could really do with a proper manual as eManualsOnline and another company whose name I forget have been less than utter rubbish.
Many thanks in advance.