Types 300 / 320 / 350 (W 03, W 04, W 05)
Mercedes-Benz 12/55 hp type 300
Type 12/55 hp type 300 
Name 12/55 hp type 300  
Name Mercedes-Benz 12/55 hp type 300  
Short name 12/55 hp type 300  
Model W 03 
Production 1926 - 1927 
Number produced 834 
Comments concerning the production period  
Prices chassis RM 9.500,- tourer (6 seats) RM 11.800,- saloon (6 seats) RM 13.800,- cabriolet (2/3 seats) RM 13.500,- cabriolet (4 seats) RM 14.500,- 
Wheelbase 3430 mm 
Track rear/front 1420/1420 mm 
Length 4650 mm 
Width 1760 mm 
Height 1920 mm 
Smallest turning circle 13,8 m 
Chassis weight
Max. total weight tourer: 2550 kg; Pullman Saloon: 2750 kg 
Max. front axle weight  
Max. rear axle weight  
Max. load  
Max. trailer weight braked  
Max. trailer weight unbraked  
Weight empty tourer: 1800 kg; Pullman saloon: 1980 kg 
According to guideline  
Operating method four-stroke Otto 
Configuration front, parallel; upright 
Type M 7456 
No. of cylinder/configuration 6 / in line 
Bore x stroke 74 x 115 mm 
Total displacement 2968 ccm 
Compression ratio 5,0 
Crankshaft bearing
Output 55 hp at 3200 /min 
Maximum torque  
No. of valves/configuration 1 intake, 1 exhaust / lateral, upright 
Valve operation 1 lateral camshaft 
Camshaft drive via spur gears 
Mixture formation 1 horizontal-draught carburetter Zenith HKG 
Cooling water cooling / pump 
Lubrication pressure circulation lubrication / 8 l oil 
Electric system 12 V 
Battery 40 Ah / under the floor 
Dynamo 80 W 
Starter motor electrical / 1,2 PS 
Ignition magneto ignition 
Fuel tank in the rear / 60 l 
Fuel supply  
Driven whells rear wheels 
Power transmission cardan shaft 
Frame desing U-type sectional pressed-steel frame 
Wheel suspension front rigid axle 
Wheel suspension rear rigid axle 
Suspension front split springs 
Suspension rear Underslung-split springs 
Damper  
Steering screw spindle, right or left 
Steering transm ratio  
Breaking system braking system 
Breaking system mechanical, effective on front- and rear wheels 
Parking breake parking brake 
Parking breake mechanical, effective on rear wheels 
Diamatre  
Wheels wood-, steel- or wire-spoked wheels 
Wheels rims  
Tyres 32 x 6,00, 32 x 6,20 low pressure or 6,00-20 

Skrzynie biegów tego modelu (gearbox and performance):

Types 300 / 320 / 350 (W 03, W 04, W 05)
Mercedes-Benz 12/55 hp type 300
Gearbox 4-speed gear shift 
Availability  
Shifting Control lever car center 
Clutch Multiplate friction clutch 
Type of gearbox Pinion change gear 
Synchromesh gears  
Gear transmission I. 3,85; II. 2,29; III. 1,58; IV. 1,0 
Differential ratio 5,40 
Maximum speed 100 km/h 
Accelerations  
Comments  
Fuel consumption 18 l 
acc. to guideline