Start with what the Benz Spider is: a car with gasoline engine, from Benz & Cie.. What it meant takes a little longer.
The hardware
The engine is gasoline engine. On the scales it comes to 1000 kg. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Family and rivals
Its Benz & Cie. stablemates include the Benz 10/18 PS and the Benz 10/20 PS.