What is "automechanika"

With around 4,600 exhibitors, Automechanika is the world’s biggest trade fair for the automobile aftermarket. It is held every two years (in even years) in alternation with the International Motor Show Germany (Internationale Automobil-Ausstellung – IAA Pkw) at the Messe Frankfurt. In distinction to the Motor Show, Automechanika is open to trade visitors only.