Original 1965 Mercedes-Benz advertisement for the German company's Model W110 (190 D) class automobile.
 
Mercedes introduced the W110 here (aka the 190 D) in 1961 as the German automobile manufacturers’ standard line of mid-size vehicles for much of the 1960s.  As part of Mercedes' unified platform of “fintail” (in German, heckflosse) models. 
 
Mercedes first introduced the car as a six-cylinder Mercedes W111 in 1959, with the W110 here following in April 1961.  Initially available with either 1.9 L M121 gasoline or 2.0 L OM621 diesel inline-four engines (with the “D” here indicating a diesel engine).  Diesel engine technology was pioneered by Mercedes-Benz and championed despite widespread derision in the motoring press at the time.  The W110 was introduced as the 190c and 190Dc sedans.
 
Of note, the Mercedes-Benz W110 and the six-cylinder W111 were the first series of Mercedes cars to be extensively crash tested for occupant safety.
 
Dimensions: 10.25 inches wide by 13.5 inches high