Complex sentence: Fritz Wenk had to discontinue his Monza production in 1958 after the new Auto Union 1000 Sp was launched in 1957 and Auto Union refused to provide additional new chassis for his production of the Monza.
Split into simpler sentences: Fritz Wenk had to discontinue his Monza production in 1958 after the new Auto Union 1000 Sp was launched in 1957. As a result Auto Union refused to provide additional new chassis for his production of the Monza.