Types 300 - 300 d (W 186, W 189)
Mercedes-Benz type 300 c Cabriolet D
Type 300 c Cabriolet D 
Name 300 c Cabriolet D 
Name Mercedes-Benz type 300 c Cabriolet D 
Short name 300 c Cabriolet D 
Model W 186 IV 
Production 09.55/12.55 - 06.56 
Number produced 51 
Comments concerning the production period begin of production - pre-production batch / main production - end of production 
Prices 24.700,00 DM (with manual transmission) and 26.200,00 DM (with automatic transmission) 
Wheelbase 3050 mm 
Track rear/front 1480/1525 mm 
Length 5055 mm 
Width 1838 mm 
Height 1600 mm 
Smallest turning circle 12,6 m 
Chassis weight
Max. total weight 2360 kg 
Max. front axle weight 1110 kg 
Max. rear axle weight 1250 kg 
Max. load 420 kg, with automatic 370 kg 
Max. trailer weight braked 1200 kg 
Max. trailer weight unbraked 750 kg 
Weight empty 1940 kg, with automatic 1990 kg 
According to guideline DIN 70020 (with fuel, spare wheel and tool equipment) 
Operating method four-stroke Otto 
Configuration front, parallel; upright 
Type M 186 II / 186.920, with automatic 186.921 
No. of cylinder/configuration 6 / in line 
Bore x stroke 85 x 88 mm 
Total displacement 2996 ccm (tax classification: 2975 ccm) 
Compression ratio 7,4 - 7,5 
Crankshaft bearing 7 
Output 125 hp at 4500 /min 
Maximum torque 22,5 mkg at 2600 /min 
No. of valves/configuration 1 intake, 1 exhaust / overhead 
Valve operation top camshaft 
Camshaft drive duplex roller-type chain 
Mixture formation 2 register-downdraught carburetters Solex 32 PAIAT with automatic choke 
Cooling water cooling / pump; 21 l water 
Lubrication pressure circulation lubrication / 6,5 l oil 
Electric system 12 V 
Battery 70 Ah / in the engine compartment 
Dynamo 150 W 
Starter motor electrical / 1,0 PS 
Ignition battery ignition 
Fuel tank in the rear / 72 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 single-joint swing axle 
Suspension front coil springs, torsion bar stabilizer 
Suspension rear double coil springs, electrically engageable torsion-bar suspension 
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, 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 5,50 K x 15 
Tyres 7,60 S 15 (6 PR) 

Skrzynie biegów tego modelu (gearbox and performance):

Types 300 - 300 d (W 186, W 189)
Mercedes-Benz type 300 c Cabriolet D
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. 3,44; II. 2,30; III. 1,53; IV. 1,0; R. 3,08 
Differential ratio 4,67 
Maximum speed 160 km/h 
Accelerations 17 s 
Comments Acceleration with shifting through from 0 - 100 km/h; loaded with 2 persons 
Fuel consumption 12,5 l 
acc. to guideline DIN 70030, ascertained at 3/4 of max. speed, maximal 110 km/h, unter Zuschlag von 10 % 
Types 300 - 300 d (W 186, W 189)
Mercedes-Benz type 300 c Cabriolet D
Gearbox 3-speed autom. gear shift 
Availability by request 
Shifting Switch lever at steering wheel 
Clutch hydr. torque converter in the aut. gear 
Type of gearbox Planet gear 
Synchromesh gears  
Gear transmission I. 2,303; II. 1,435; III. 1,0; R. 2,01 
Differential ratio 4,67 
Maximum speed 155 km/h 
Accelerations 18 s 
Comments Acceleration with shifting through from 0 - 100 km/h; loaded with 2 persons 
Fuel consumption 12,5 l 
acc. to guideline DIN 70030, ascertained at 3/4 of max. speed, maximal 110 km/h, unter Zuschlag von 10 %