I am going to change the oil and filter on our 330d, gearbox is the ZF 6HP26, I have found a website that sells service kits but the price varies a lot.
He offers three kits, two ZF genuine and one none genuine. I am unsure which one I need, the top of the range comes with rivets, oil, pan, filter, gasket, new sump plug, new bolts to hold the pan on and everything you would ever need to perform a full service, the mid range has no rivets or bolts or sump plug but does have a filter, sump pan, gasket and oil.
The cheaper one is Meyler, it has a filter, gasket, sump pan and oil, you have to re use the old sump bolts and drain plug.. I think this is adequate.
However I would appreciate anybodies views who have done the job or bought any of these service kits.
Here is a link to the items in question.
Incar Motor Factors