Trying to find any information on WILHELM ROTTENBERG.

Unfortunately the information I have is limited.

Born approximately 1900.
Wilhelm had a brother Freidrich who married an Anna they had a daughter Lieselotte.
Wilhelm had a sister Maria. Think that Maria was the eldest sibling.
Lived in Peine Germany.
Worked as a mechanic.
Emigrated to Buenos Airies in approx 1924 to work for Ford Motor Company.
Had an uncle who was a dentist
Any help appreciated - as research in Germany is totally new to me.
Cant find a birth record in IGI ??
Thank you