Types 300 S and 300 Sc (W 188)
Mercedes-Benz type 300 S Roadster
Type 300 S Roadster 
Name 300 S Roadster 
Name Mercedes-Benz type 300 S Roadster 
Short name 300 S Roadster 
Model W 188 I 
Production 09.52 - 06.55 
Number produced 141 
Comments concerning the production period  
Prices 34.500,00 DM 
Wheelbase 2900 mm 
Track rear/front 1480/1525 mm 
Length 4730 mm 
Width 1910 mm 
Height 1510 mm 
Smallest turning circle 12,3 m 
Chassis weight
Max. total weight 2000 kg 
Max. front axle weight 930 kg 
Max. rear axle weight 1070 kg 
Max. load 260 kg 
Max. trailer weight braked 1200 kg 
Max. trailer weight unbraked 750 kg 
Weight empty 1760 kg 
According to guideline DIN 70020 (with fuel, spare wheel and tool equipment) 
Operating method four-stroke Otto 
Configuration front, parallel; upright 
Type M 188 / 188.920 
No. of cylinder/configuration 6 / in line 
Bore x stroke 85 x 88 mm 
Total displacement 2996 ccm (tax classification: 2975 ccm) 
Compression ratio 7,8 
Crankshaft bearing
Output 150 hp at 5000 /min 
Maximum torque 23,5 mkg at 3800 /min 
No. of valves/configuration 1 intake, 1 exhaust / overhead 
Valve operation top camshaft 
Camshaft drive duplex roller-type chain 
Mixture formation 3 downdraught carburetters Solex 40 PBJC 
Cooling water cooling / pump; 19,5 l water 
Lubrication pressure circulation lubrication / 6,5 l oil 
Electric system 12 V 
Battery 56 Ah / in the engine compartment 
Dynamo 150 W 
Starter motor electrical / 1,0 PS 
Ignition battery ignition 
Fuel tank in the rear / 85 l 
Fuel supply diaphragm pump 
Driven whells rear wheels 
Power transmission divided cardan shaft 
Frame desing X-shaped oval tube frame with centre reinforcement / all-steel body 
Wheel suspension front double wishbone 
Wheel suspension rear oscillating swing axle 
Suspension front coil springs, torsion bar stabilizer 
Suspension rear double coil springs 
Damper hydraulic telescopic damper 
Steering recirculating-ball steerg. 
Steering transm ratio 21,4:1 / 3,75 steering wheel turns 
Breaking system braking system 
Breaking system hydraulic, since 1954 with vacuum-operated brake servo unit, effective on front-~and rear wheels ; drum brakes front and rear 
Parking breake parking brake 
Parking breake mechanical, effective on rear wheels 
Diamatre brake drums front / rear: 260 mm 
Wheels sheet steel-disc wheels 
Wheels rims drop centre rim 5 K x 15 
Tyres 6,70-15 extra (6 PR) 

Skrzynie biegów tego modelu (gearbox and performance):

Types 300 S and 300 Sc (W 188)
Mercedes-Benz type 300 S Roadster
Gearbox 4-speed gear shift 
Availability Series 
Shifting Gear shift 
Clutch Single-plate dry clutch 
Type of gearbox Pinion change gear 
Synchromesh gears I - IV 
Gear transmission I. 3,68; II. 2,25; III. 1,42; IV. 1,0; R. 3,08 
Differential ratio 4,125 
Maximum speed 175 km/h 
Accelerations 15 s 
Comments Acceleration with shifting through from 0 - 100 km/h; loaded with 2 persons 
Fuel consumption 13,8 l 
acc. to guideline DIN 70030, ascertained at 3/4 of max. speed, maximal 110 km/h, unter Zuschlag von 10 %