Start with what the Benz Dos-à-Dos is: a car with gasoline engine, from Benz & Cie.. What it meant takes a little longer.
What is underneath
The engine is gasoline engine. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Its place in the line
Nearby in the Benz & Cie. catalogue sit the Benz 10/18 PS and the Benz 10/20 PS.
The record
The open record for the Benz Dos-à-Dos carries no verified engine, output, weight or price yet. MotorJury does not fill gaps with guesses; this entry gives the model a home in the catalogue and grows as sourced specifications and photographs arrive. Corrections: corrections@motorjury.com.