Hi Stefan,
I do check the forum fairly regularly and there is also a possibility to send private messages (even in German which I don't use when I write in public).

But I don't mind answering here. You must have understood something wrong, as the 'engine' were my very own legs! It was a special kind of tricycle I had as a kid -- more than 25 years ago ...

Incidentally I wrote about it only yesterday: http://forum.imcdb.org/forum_topic-1588-18742-First_car_you_ever_drove.html#p18742

Cheers,
Alexander