In April of 1951 a public auto show open to the public took place in Frankfurt, and 570,000 visitors came to the event. Six months later, the first IAA took place in Frankfurt. That same month 290,000 car hungry people attended a similar event in Berlin, labeled an Auto Salon. These two gatherings reflected the rebirth of the German auto industry.
The brochure above is in my possession and is an important bit of ephemeral material on the 1951 show.