Hello, I’m new here and unfortunately I haven’t found anything about the search function, I have the following problem with my A6/C4 2.5 TDI from 1996: The car starts at warmer temperatures (over 5 degrees) only after a very long time, if it is colder it glows before and then starts perfectly. All filters, glow candles and the battery have already been changed. Can anyone help me further? mfg Timo