Hi - Dishwasher BDW13 Baumatic
Completes a rinse successfully however, on a full wash worked well for 1.5 hours but did not complete cycle and water left in bottom??
Is it giving you any fault indications? Check the manual and see what to expect.
Check the drain pump and drain is clear. Again, the manual should show you how.
I did a quick Guggle search and nothing relating to poor draining came up BUT that model seems to have a history of problems with the lower spray arm, so it might be worth having a quick look at a few if the sites discussing that, as it might be related.