A new model generation of the mid-size model series was launched in December 1984. In technical terms, the 124 model series had a number of similarities with the compact class presented for the first time in 1982. A lower weight thanks to the use of high-strength steels and other materials as well as aerodynamic optimisation reduced the fuel consumption considerably.
The start of sales of the revised models marked a new nomenclature also taking effect for the 124 model series in June 1993. Like the S-Class and the new C-Class, the mid-size series now went by the name E-Class.