Mercedes-Benz W15

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Mercedes-Benz 170
MHV MB W15 170-6 1931 cropped.jpg
Mercedes-Benz 170 (1931)
Overview
Manufacturer Mercedes-Benz
Also called Mercedes-Benz Typ(e) 170
Mercedes-Benz W15
Production 1931–1936
13,775 units
Assembly Stuttgart, Germany
Body and chassis
Class Mid-size family car
Layout FR layout
Powertrain
Engine 1,692cc I6
Dimensions
Wheelbase 2,600 mm (100 in)
Length 3,940 mm (155 in)
Width 1,630 mm (64 in)
Height 1,650 mm (65 in)
Chronology
Successor Mercedes-Benz W136

The Mercedes-Benz W15 is a car made by Mercedes-Benz made from 1931 to 1936, with a few sales continuing through the first few months of 1937. Although known in retrospect by its internal works number as the Mercedes-Benz W15, it is one of several cars from the manufacturer that was known in its own time as the Mercedes-Benz 170.

The car has been seen as the most important new model at the Paris Motor Show in October 1931. It was also the most significant creation of Hans Nibel, the manufacturer's high profile Technical Director who had taken over the position from Ferdinand Porsche at the start of 1929.[1]

A smaller Mercedes-Benz[edit]

With the economy still reeling from the successive after shocks that followed the Wall Street crash, Hans Nibel, the manufacturer's Technical Director conceived of the 170 as a compact light-weight car. Mercedes-Benz had by now become known as a manufacturer of large expensive cars that tended to grow larger and less affordable with each upgrade: the 170 of 1931 represented a conscious strategy of broadening the range down market, a pattern that they would repeat with the 190 in 1982 and again with the A-Class in 1997.

The 170 in bare chassis form, as delivered to a coach builder or the body shop, weighed 750 kg (1,653 lb). With a conventional coupé or sedan/saloon body added, the car weighed between 1,050 kg (2,315 lb) and 1,200 kg (2,646 lb), with a laden weight of around 1,455 kg (3,208 lb).[2]

Chassis[edit]

The 170 was the first Mercedes with all-round independent suspension. There was no full width axle at the front, the wheels being suspended from two transverse leaf springs. At the back there were two half swing-axles. The suspension lay-out, which minimized unsprung mass and provided a high level of stability, was subsequently introduced across the entire Mercedes-Benz range, giving the cars a quality of comfort and safety that competitors using the then common combination of rigid axles and leaf springing could not match.[3]

The brakes, controlled via oil pressure, operated on all four wheels. An ignition steering lock was an anti-theft device which was incorporated as a standard feature.

Although both the innovative suspension and the compact chassis might have been seen as a gamble in 1931, their dependability and quality were reflected in the fact that they continued unchanged throughout the car's production run.[1]

Engine[edit]

The car was powered by a six cylinder 1,692 cc engine:[4] maximum power was set at 32 PS at 3,200 rpm. The engine featured central lubrication and the water-based cooling system for the engine employed both a pump and a thermostat. Power was transmitted to the rear wheels via what was in effect a four speed manual transmission, on which the top gear operated as a form of overdrive. Third gear used the 1 : 1 ratio conventionally used by a top gear, and there was a fourth gear with a ratio of 1 : 0.73. Fuel economy was quoted as 11 litres per 100 kilometres (26 mpg-imp; 21 mpg-US) and top speed 90 km/h (56 mph), which combined to represent a competitive level of performance in the passenger car market of that time.

Body options[edit]

At its 1931 launch the car was offered in bare chassis form (for customers wishing to purchase a car body from a coach builder) at a manufacturer's recommended price of 3,800 Marks, a four door "Limousine" (sedan/saloon) for 4,400 Mark or as a Cabriolet for 5,575 Marks.[2] Subsequently differently configured cabriolets, a sports roadster and, for military use, a Kübelwagen were added to what was, by 1934, an unusually a wide range of standard body types offered.

Initially any substantial item of luggage would need to be fastened to a rack on the outside of the car at the back. In 1934 the bodies for the two mainstays of the range, the four door sedan/saloon and the "Cabriolet C" received new more "streamlined" bodies and sloping tail's which now incorporate an internal luggage compartment. 1934 also saw for the first time a two door "Limousine" (sedan/saloon), closely resembling the four door equivalent, apart from the number of doors. The more streamlined bodies of the 170 saloon in 1934 also adumbrated the shape of the car's successor, although the streamlined form was better suited to the longer 2,845 mm (112.0 in) wheelbase of the later car than the 2,600 mm (100 in) wheelbase on which the W15 170 sat throughout its life.[1]

Light van[edit]

At the start of 1932 the Mercedes-Benz Kastenwagen (light van) Typ L 300 joined the range. It shared the mechanical underpinnings of the 170 and could carry a load weighing up to 300 kg - hence the name.

Commercial[edit]

In a period of economic crisis and shrinking incomes, the 170 and its van derivative enabled Daimler-Benz- AG, a company hitherto known only for big expensive cars, to survive. The modern independent suspension lay-out and hydraulic brakes provided a comfortable and safe driving experience. Between 1931 and 1936 the firm produced 13,775 of the cars. The highest annual production total of 4,438 was achieved in 1932, early in the car's career, suggesting the Mercedes had correctly understood the German auto-market within which at this time virtually the entire production was sold. 1932 was a particularly poor year, so that the 170's sales in that year represented more than 10% of Germany's passenger car sales. Thereafter the German auto-market bounced back strongly, as employment recovered, other manufacturers attracted customers with smaller lighter cars and the government, in 1933, abolished annual car tax, so that the 3,030 cars produced during 1935 which was the W15 170's last full year of production represented a market share of less than 2%.[1]

The 170 continued to be offered until 1936 when it was replaced by the four cylinder 170V. It also provided much of the chassis-architecture for more powerful subsequent models such as the 200 model of 1933 and its successors.

Sources and further reading[edit]

  1. ^ a b c d Oswald, Werner: Deutsche Autos 1920-1945, volume 2, p. 238
  2. ^ a b Oswald, page 239
  3. ^ Oswald, p. 238 & 239
  4. ^ The actual cc was 1692 cc but the Steur cc (tax engine size) was 1680cc. Annual car tax in Germany was charged between 1928 and 1933 according to engine size but, presumably in order to simplify their calculations, the German Finance Office applied roundings in deriving the engine size from the cylinder dimensions with the result that tax cc differed slightly from actual cc. Modern sources sometimes confuse the two figures.Oswald, p. 532

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