Starting problem Golf IV 110PS

Hello!

I'm experiencing some issues with the starting behavior of my Golf.

Symptoms:

- Occasionally starts up slowly, regardless of temperature.
- Start time is frequently up to 4 seconds.
(No issues with the operation of the vehicle.)

'From fuel filter to voltage supply relay, to control-start sequence (error memory cleared)... everything has already been checked/replaced.'

I've noticed that a larger air bubble becomes visible in the intake manifold a few seconds after the engine is turned off.

Maybe someone has some tips for me...

greetings

Hi.

Try opening the fuel tank cap; it might be due to a vacuum inside the tank.

Otherwise:
Okay, I'm ready. Please provide the German text you want me to translate.
(read thoroughly)

Let's measure the battery capacity; if it's slowly degrading, it can cause problems with the TDI engine starting. 'The same thing suddenly happened to my TDI_90.'
With a new battery, it then ran like it did on the first day.

Thank you for the tip...

Put in a new battery and it's working!