From 1993, the 124 series was officially marketed as the E-Class.- Mercedes-Benz W124
By the launch of the facelifted W124 in 1993 fuel-injection was ubiquitous in Mercedes engines, and the E was adopted as a prefix (i.e., E 220) and the model line referred to officially as the E-Class (or E-Klasse).- Mercedes-Benz E-Class
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The Mercedes-Benz W210 was the internal designation for a range of executive cars manufactured by Mercedes-Benz and marketed under the E-Class model name in both sedan/saloon (1995-2002) and station wagon/estate (1996-2003) configurations.
W210 development started in 1988, three years after the W124's introduction.