Type 320 (W 142)
Mercedes-Benz type 320 n
Type 320 n 
Name 320 n 
Name Mercedes-Benz type 320 n 
Short name 320 n 
Model W 142 I 
Production 1937 - 1938 
Number produced altogether 5.097 (both chassis- and engine versions) 
Comments concerning the production period  
Prices chassis RM 6.500,- cabriolet A RM 11.800,- CoupŠ (top detachable) RM 12.300,- 
Wheelbase 2880 mm 
Track rear/front 1475/1500 mm 
Length 4700 mm 
Width 1770 mm 
Height 1500 mm 
Smallest turning circle 11 m 
Chassis weight
Max. total weight 2300 kg 
Max. front axle weight  
Max. rear axle weight  
Max. load  
Max. trailer weight braked  
Max. trailer weight unbraked  
Weight empty 1725 kg 
According to guideline  
Operating method four-stroke Otto 
Configuration front, parallel; upright 
Type M 142 I 
No. of cylinder/configuration 6 / in line 
Bore x stroke 82,5 x 100 mm 
Total displacement 3208 ccm (tax classification: 3185 ccm) 
Compression ratio 5,6; 6,6 or 7,25 
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 wire-spoked wheels 
Wheels rims  
Tyres 6,50-17 

Skrzynie biegów tego modelu (gearbox and performance):

Type 320 (W 142)
Mercedes-Benz type 320 n
Gearbox 4-speed gear shift 
Availability  
Shifting Control lever car center 
Clutch Single-plate dry clutch 
Type of gearbox Pinion change gear 
Synchromesh gears I - IV 
Gear transmission I. 3,90; II. 2,16; III. 1,49; IV. 1,0 
Differential ratio 4,33 
Maximum speed 130 km/h 
Accelerations  
Comments  
Fuel consumption 17 l 
acc. to guideline