The September/October 2018 issue of the 'Der Bayerische' magazine by the National Capital Chapter of the BMW Car Club of America features articles on member experiences at the Oktoberfest and Pittsburgh Vintage Grand Prix, upcoming events, and insights into autocross participation. The president's message highlights a successful celebration at Oktoberfest and encourages members to participate in various club activities. The issue emphasizes community and camaraderie among BMW enthusiasts while providing information about club officers and contributions from various writers.