Hi , I have a 2005 1.9 diesel automatic. When engine cold it won't change from 1st to 2ND. When I sit and warm engine for 5 mins it runs fine. I have changed Maf sensor, TMap sensor, fuel filter,air filter and drained of auto transmission fluid twice now and still does the same. Is it worth draining off again just to hopefully get rid of any old fluid still left. Check engine light does nit come on. No fault codes showing up. Any more ideas or shall I just get used to warming it up. Thanks