Conversation so far:
Where was their international breakthrough?
Kraftwerk went on a multi-date tour to promote the Autobahn album, a tour which took them to the US, Canada and the UK for the first time.
Was there any successful singles from autobahn?
The radio edit of the title track became a surprise international hit, reaching number 11 in the UK and number 25 on the US Billboard Hot 100 chart.
Was radioactivity an album that Kraftwerk produced?
This was the first Kraftwerk album to be entirely self-produced by Ralf Hütter and Schneider in their Kling Klang studio.

Question: Was that album successful?
Self-contained rewrite: Was the album Radio-Activity successful?