Thanks for all the answere!

The car have been scanned at MB dealer.
They sayd it was no codes.
This was done after the ATF fluid was changed.
So the ATF level should have been checked.
What scanner is recommended if I should by one?

The AT have also been scanned once before at a independent MB AT "spesialist". He also sayd no codes. And the problem could be Electronic Hydraulic Unit. He needed the car overnight to say more...

I will check the ATF level @ 80°C, factory dip stick ordered.
Filled with MB ATF oil, bought for 220 CDI, I will check the type.

It might be only the bad pulling (when cold) problem left.