Marklin Z parts manual
Maybe you already know this but...
I had to order some parts for my M F7 and
was suprised to find out that my local dealer
had a sheet which he got from M which had a exploded
view of all the engines (and more) and the part numbers
(the words were in German, but a picture is worth a
thousand words). I though that having that would be
nice so I looked around and found a down loadable
version of this at www.marklin.com/tech
I down loaded it and it's great (one minor problem
if you live on this side of the pond - it's 44MB
and took me about 20 minutes to down load through
my cable modem - imagine how long it would take
using a 56K modem). It was worth the wait.