not really just new to cars especially benzos and diesels in general i was wondering where exactly i would find the mono valve in a 79 300d i tried to look in my books one haynes the other a chilton the chilton sucks cause it is not for only models of the diesel type but regular gas engines im not so sure where i would look in the book as well but there is no mention of it in the master index in the back of it if any one might pehaps have i diagram on where it would be located i can only find a repair kit so ican match any pictures to the parts in my car like i said im an idiot