- Passenger Cars
- Mercedes-Benz Passenger Cars, since 1946
- E-Class Saloons and predecessors
- "Ponton Mercedes", four-cylinder models (W 120, W 121), 1959 - 1962
- 190 b chassis with four-door partial body / W 121 B III, 1959 - 1961
190 b chassis with four-door partial body
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- Design name: W 121 B III
- Type: 121.000 (ambulance); 121.002 (estate)
- Production period: 1959 - 1961
- Combustion principle: four-stroke petrol
- Configuration: front, longitudinal; vertical
- Engine type: M 121 B I b / 121.920
- Number of cylinders / arrangement: 4 / in-line
- Bore x Stroke: 85 x 83.6 mm
- Total displacement: 1897 cc (tax classification: 1882 cc)
- Compression ratio: 8.5
- Rated output: 80 hp at 4800 rpm
- Rated torque: 14.2 mkg at 2800 rpm
- Number of valves / arrangement: 1 intake, 1 exhaust / overhead
- Valve operation: 1 overhead camshaft
- Camshaft drive: double roller chain
- Fuel system: 1 Solex 32 PAITA compound downdraught carburettor
- Fuel tank: position / capacity: in the rear / 56 l
- Frame design: floor assembly / steel unit body
- Front-wheel suspension: double wishbone
- Rear-wheel suspension: single-joint swing axle
- Front springs: coil springs, torsion bar stabiliser
- Rear springs: coil springs
- Shock absorber front/rear: telescopic shock absorbers
- Steering: recirculating-ball steering
- Brake system (foot brake): hydraulic (vacuum booster optional), acting on front- and rear wheels; four-wheel drum brakes
- Parking brake (hand brake): mechanical, acting on rear wheels
- Wheels: sheet-steel disc wheels
- Wheel rims: drop-centre rim 4 1/2 K x 13 B; from 09.1960: 5 JK x 13 B
- Tires: 6,70-13
- Driven wheels: rear wheels
- Drivetrain: divided cardan shaft
- Gearing: 4-speed manual transmission
- Availibility: as standard
- Shifting: steering-column shift lever
- Clutch: dry single-disc clutch
- Transmission type: change-speed gear
- Gear ratios: I. 4.05; II. 2.38; III. 1.53; IV. 1.0; R. 3.92
- Final drive ratio: 4.10
- Wheelbase: 2650 mm
- Front / rear track: 1430 / 1475 mm; from 09.1960: 1440 / 1485 mm
- Length: 4466 mm
- Width: 1740 mm
- Kerb weight: 1030 kg
- by Guideline: chassis with partial body, tank full, not including spare wheel and tool kit
- Gross weight: for ambulance: 1870 kg; for estate: 2020 kg
- Units produced: 349 chassis with 4- and 2-door partial body, resp.19
- Prices: 08.1959: DM 8750.00