Handling control systems, such as the automatic locking differential (ASD), the acceleration skid control system (ASR), and the automatically engaging all-wheel drive system 4MATIC, celebrated their premiere in the Mercedes-Benz 124 model series in September 1985, initially at the IAA International Motor Show in Frankfurt/Main, and then in February 1986 at a driving presentation.

D247862 Mercedes-Benz assistance systems in 1985: Three building blocks for greater safety