Guys if you look in the W123 FSM chapter 07-001 in the non turbo section gives you a nice list of IP + governor + lift pump numbers
You can see the secret combinations there.
@300d_4_me if you don't have access to the FSM (or you can't get the sodding free version on
www.startekinfo.com to work for you) then post up the IP number (Bosch number) and I'll look it up for you.
You will probably have a MW pump and a lift pump that looks similar to the one in this thread
http://www.peachparts.com/shopforum/diesel-discussion/306090-papas-got-brand-new-om617-ip-play.html#post2801204
There's information on refreshing both pumps here =>
http://www.peachparts.com/shopforum/diesel-discussion/294499-refreshing-fuel-pump-om617-european-spec-%96-non-turbo.html
EDIT - sorry Diesel911 you've already posted that one! (He's faster than a speeding bullet you know!)