Boah,
I downloaded a Clone CD image of V22 and burned it on 1x speed

Then I went to the car and put it on ignition. Crossing my fingers I inserted the newly burned V22 CD and waited. The CD got in, spined around maybe a minute then it jumped out and went in again. During that time the display was just showing like playing the radio. Sudenly after the CD went in again automatically i saw the well known update screen. It took longer then i was used (but I have never updated V17 to V22 before) to and stayed a while at 99%! Then it jumped out I made the restart and there it was the so long awaited insert key cd message. Inserted the key cd and voila the job was done

I think I will never ever try to update a MKIII. THe next step will be to upgrade the screen to 16:9
Thanks guys
TImiboy