Hi,
A flashing pre-glow sign usually indicates that the vehicle's glow plugs are active, helping to warm the engine before starting, especially in cold weather. However, if it continues flashing after the engine has started, it could signal a fault in the glow plug system, sensors, or related electronics. It's best to check your vehicle's manual for guidance and have it inspected by a qualified mechanic to prevent possible engine starting or performance issues. https://ssoidportal.org/

Hi karait,
I think you are right. My first idear was the engine kontroler.
But it is a expensive part, die you know if Linde Software or engine Software is required?
Rgds
Dieter_n

Is this the yellow LED with the spiral?
Well - if it flashes you may have some malfunction in the
engine or in the engine control unit. I'm afraid, you have to use some diagnostics soft.