BMW CEO Harald Krüger collapsed on stage during a presentation in Frankfurt on Tuesday. The luxury car maker then canceled the news conference. A BMW spokesman said Mr. Krüger was treated by a doctor on the premises. “Mr. Krüger’s health is stable and he is recovering well,” the company said in a statement. Mr. Krüger, 49, took the helm at BMW in May having previously headed the luxury auto maker’s production activities.