Mercedes-Benz W10 is First Produced

The Mercedes-Benz Mannheim 350 replaced the W03 350 models in 1929.

The structure originated by Ferdinand Porsche was modified by Hans Nibel .

In contemporary records the car was also sold as the “Mercedes-Benz 14/70 PS”, reflecting respectively its “fiscal” and “actual” horsepower.
In essence the car followed the construction of the its predecessor. However, the wheelbase was reduced by 230 mm (9 inches) and the vehicle even in standard form was a little lighter. In addition to the “Tourer” (two door four seater cabriolet) body, the car was available as a four door saloon and as a “Pullman Limousine”
The straight-six 3444 cc engine was also carried over from the predecessor model. In this application an output of 70 PS (51 kW) was claimed, delivered to the rear wheels through a three speed gear box controlled through a centrally mounted lever. Both axles were rigid, suspended on semi-elliptical leaf springs. Cable-operated brakes provided stopping power to all four wheels. The stated maximum speed was 95 km/h (59 mph).

In contemporary records the car was also sold as the “Mercedes-Benz 15/75 PS”
Launched alongside the Mannheim 350 was the Mannheim 370. In this form, the car had a straight-six 3689 cc. Output of 75 PS (55 kW) was claimed. The three speed gear box was offered, at extra cost, with a fourth higher ratio. The maximum speed claimed for the Mannheim 370 was 100 km/h (63 mph)

From 1930 the 370K ws offered with a wheelbase shortened by 175 mm (7 inches).
Only cabriolet bodied versions of the 370K were offered. The reduced size of the car permitted a maximum speed of 105 km/h (65 mph) to be claimed.

Shorter still, on a wheelbase of just 2850 mm (112 inches) was the 370S, available only with roadster or sport-cabriolet bodies. The maximum speed on these versions was stated as 115 km/h (71 mph). In 1933 the manufacturers increased the compression ratio from 5.5:1 to 5.75:1 with a corresponding increase in power output to 78 PS (57.3 kW) at 3400 rpm

In contemporary records the car was also sold as the “Mercedes-Benz 15/80 PS”
The 380S came on the standard 3200 mm wheelbase, but the car was distinguished by its longer eight cylinder side-valve engine. Claimed output of the 3820 cc unit was 80 PS (59 kW).
Available with a choice of cabriolet bodies, the car, like its six cylinder sibling, rode on two rigid axels suspended on semi-elliptical leaf springs. A top speed of 120 km/h (75 mph) was claimed.

In contemporary records the car was also sold as the “Mercedes-Benz 15/85 PS”
A superficially comparable version of the car which appeared towards the end of the product run, the 380S (W19) appeared with swing axle rear suspension and a cross mounted leaf spring arrangement at the front. Reflecting the extent of the change, this model acquired its own internal model number, W19, which differentiates it from the other members of the Mannheim line. This car can really be seen as a prototype for the car’s Type 380 (W22) successor.
A still higher compression ratio accounted for a claimed increase in output to 85 PS (62.5 kW)