The W110 "Fintail" (German: Heckflosse ) was Mercedes-Benz's line of midsize four-cylinder automobiles in the mid-1960s. The line was introduced with the 190c and 190Dc sedan in April, 1961, replacing the W120 180c/180Dc and W121 190b/190Db .The 190c replaced the W120 180c/180Dc and W121 190b/190Db as Mercedes-Benz's line of less-expensive four-cylinder