Opel Astra: Cold Start Problems - 1.7TD Fix

My x17dtl engine only starts after a long cranking period when it's warm. When it's cold, it starts immediately! Once it's running, the check engine light illuminates for a few seconds, then goes out, and the engine runs perfectly fine.

'When the fuel level is below 1/4 and when taking sharp turns, going through roundabouts, or exiting highways, the engine briefly goes into a limp mode. The check engine light flashes briefly, as if the fuel is momentarily running out. I've already checked the fuel tank and the fuel pump, but haven't found anything.'


Maybe someone has an idea before I have to take the car to the dealer next week.

Thank you and best regards.
Toto.