Why my car spewing start in the morning on 2005 BMW 545i

My car doesint start in the morning when i took it to BMW dealership they said they cannot find any thing wrong . But they started the vehicle up for me

Asked by for the 2005 BMW 545i
Could be any number of things that can cause a rich running problem when cold. My first thought it could be a malfuntioning tempuature sensor but I do see a TSB BMW has published a TSB that sounds simular to the symtoms you have.
Possible cause: high pressure injector failure (leakage or incorrect spraying pattern), due to internal wear
or unfavorable stack of tolerances. The TSB # should want to look it up is..... SI B 13 04 09