The 'fintail' (or Heckflosse in German) was a replacement for the 'Ponton' Mercedes-Benz cars. It re-used some of the Ponton in a widened and restyled car with American looks and the rear fins which gave it the nickname. The 4-door sedan was launched at the 1959 Frankfurt Salon with the 220b, 220Sb and 220SEb models, and the 2195cc inline six engine from the 'Ponton' cars was carried over. In 1961 the W111 Ponton was adapted for a new lower priced W110 model to give a shorter, plainer car with round headlamps. The 190 and 190D had 4-cylinder engines of 1.9-litres or 1988cc for the diesel, and the diesel was a huge seller particular as a taxi. The 4-cylinder cars were upgraded in 1965 at the same time as a new model was brought in to replace the W111 6-cylinder 220 cars. The W110 190 was upgraded to 200 with a 1988cc 4-cylinder petrol engine, or as the 200D with 1988cc 4-cylinder diesel. There was also a new 2306cc 6-cylinder engine fitted into the 230 model. In 1968 all the 'fintails' were replaced.