Type 320 (W 142)
Mercedes-Benz type 320 <3,4 ltr. engine>
Type 320 
Name 320 <3,4 ltr. engine> 
Name Mercedes-Benz type 320 <3,4 ltr. engine> 
Short name 320 <3,4 ltr. engine> 
Model W 142 IV 
Production 1938 - 1942 
Number produced altogether 5.097 (both chassis- and engine versions) 
Comments concerning the production period  
Prices chassis RM 6.800,- saloon (4 doors) RM 8.950,- Pullman saloon RM 9.800,- tourer (6 seats) RM 9.900,- cabriolet B RM 9.900,- cabriolet D RM 10.400,- Pullman-cabriolet F RM 12.500,- cabriolet A RM 13.500,- 
Wheelbase 3300 mm 
Track rear/front 1475/1500 mm 
Length 5100 - 5250 mm 
Width 1770 - 1850 mm 
Height 1520 - 1790 mm 
Smallest turning circle 12,4 m 
Chassis weight
Max. total weight 2425 - 2525 kg 
Max. front axle weight  
Max. rear axle weight  
Max. load  
Max. trailer weight braked  
Max. trailer weight unbraked  
Weight empty 1850 - 1950 kg 
According to guideline  
Operating method four-stroke Otto 
Configuration front, parallel; upright 
Type M 142 II 
No. of cylinder/configuration 6 / in line 
Bore x stroke 85 x 100 mm 
Total displacement 3405 ccm 
Compression ratio 6,25 or 7,0 
Crankshaft bearing
Output 78 hp at 4000 /min 
Maximum torque 22,2 mkg at 1700 /min 
No. of valves/configuration 1 intake, 1 exhaust / lateral, upright 
Valve operation 1 lateral camshaft 
Camshaft drive via spur gears 
Mixture formation 1 double-downdraught carburetter Solex 32 JFF 
Cooling water cooling / pump; 13 l water 
Lubrication pressure circulation lubrication / 8 l oil 
Electric system 12 V 
Battery 45, 50 or 60 Ah 
Dynamo 130 W 
Starter motor electrical / 1,4 PS 
Ignition  
Fuel tank in the rear / 72 l 
Fuel supply  
Driven whells rear wheels 
Power transmission cardan shaft 
Frame desing box type pressed-steel low-bed frame 
Wheel suspension front above each 1 wishbone, below 1 transversal spring 
Wheel suspension rear swing axle 
Suspension front internal coil springs 
Suspension rear double coil springs with internal additional coil springs 
Damper  
Steering ZF-Roá screw-and-nut steering 
Steering transm ratio  
Breaking system braking system 
Breaking system hydraulic, effective on front- and rear wheels 
Parking breake parking brake 
Parking breake mechanical, effective on rear wheels 
Diamatre  
Wheels disc wheels or wire-spoked wheels 
Wheels rims  
Tyres 6,50-17 (Cabriolet F: 7,00-17) 

Skrzynie biegów tego modelu (gearbox and performance):

Type 320 (W 142)
Mercedes-Benz type 320 <3,4 ltr. engine>
Gearbox 4-speed gear shift with add. overdrive 
Availability  
Shifting Control lever car center 
Clutch Single-plate dry clutch 
Type of gearbox Pinion change gear 
Synchromesh gears I - S. 
Gear transmission I. 3,90; II. 2,16; III. 1,49; IV. 1,0; S. 0,74 
Differential ratio 4,33; with overdrive: 3,18 
Maximum speed 126 km/h 
Accelerations  
Comments  
Fuel consumption 18 l 
acc. to guideline