the engine starts immediately at cold start and starts
(after several cleaning of the idle control valve)
quiet, without any idling.

But now I'm going to lay down about. 20 sec. the driving stage D,
The engine almost dies off.
But that's what the engine does only after a cold start !!
In the course of the day he does not do that again, even if the car has been standing for a few hours.
What can this be ??
Gearloel was changed only a few thousand kilometers ago, oil stand is right and the gear turns butter soft.

Greeting Jürgen