250 SE Cabriolet

Design name:
W 111 / III A
Type:
111.023
Production period:
08.1965 / 09.1965 - 12.1967
Note on production period:
production start-up pre-production series / standard production - end of production

Combustion principle:
four-stroke petrol (with manifold injection)
Configuration:
front, longitudinal; vertical
Engine type:
M 129 I / 129.980
Number of cylinders / arrangement:
6 / in-line
Bore x Stroke:
82 x 78.8 mm
Total displacement:
2496 cc (tax classification: 2470 cc)
Compression ratio:
9.3; from 09.1966: 9.5
Rated output:
150 hp at 5500 rpm
Rated torque:
22.0 mkg at 4200 rpm
Number of valves / arrangement:
1 intake, 1 exhaust / overhead
Valve operation:
1 overhead camshaft
Camshaft drive:
double roller chain
Fuel system:
manifold injection, mechanically controlled; Bosch 6-plunger injection pump
Fuel tank: position / capacity:
in the rear / 82 l

Frame design:
floor assembly / steel unit body
Front-wheel suspension:
double wishbone
Rear-wheel suspension:
single-joint swing axle with hydropneumatic compensating spring and level control
Front springs:
coil springs, torsion bar stabiliser
Rear springs:
coil springs
Shock absorber front/rear:
telescopic shock absorbers
Steering:
recirculating-ball steering (power steering optional)
Brake system (foot brake):
hydraulic dual-circuit brake system with vacuum booster, acting on front- and rear wheels; four-wheel disc brakes
Parking brake (hand brake):
mechanical, acting on rear wheels
Wheels:
sheet-steel disc wheels
Wheel rims:
drop center rim 6 J x 14 HB
Tires:
7.75 H 14 or 195 H 14
Driven wheels:
rear wheels
Drivetrain:
divided cardan shaft

Gearing:
4-speed manual transmission
Availibility:
as standard
Shifting:
central floor gear shift lever
Clutch:
dry single-disc clutch
Transmission type:
change-speed gear
Gear ratios:
I. 4.05; II. 2.23; III. 1.40; IV. 1.0; R. 3.58
Final drive ratio:
3.92
Maximum speed:
190 km/h
Acceleration 0-100 km/h:
11.8 s
Fuel consumption:
11.7 l
by Guideline:
DIN 70030: consumption, determined at 3/4 of top-speed (not more than 110 km/h), plus 10 %

Gearing:
4-speed automatic transmission
Availibility:
optional
Shifting:
central floor gear shift lever
Clutch:
hydraulic clutch
Transmission type:
planetary gear system
Gear ratios:
I. 3.98; II. 2.52; III. 1.58; IV. 1.0; R. 4.15
Final drive ratio:
3.92
Maximum speed:
185 km/h
Acceleration 0-100 km/h:
12 s
Fuel consumption:
11.7 l
by Guideline:
DIN 70030: consumption, determined at 3/4 of top-speed (not more than 110 km/h), plus 10 %

Wheelbase:
2750 mm
Front / rear track:
1482 / 1485 mm
Length:
4880 mm
Width:
1845 mm
Height:
1435 mm
Kerb weight:
1575 kg
by Guideline:
DIN 70020 (ready to drive, including fuel, spare wheel and tool kit)
Gross weight:
2045 kg