Technical data of Mercedes-Benz 300 SL

Model code R129, in production 1989 - 1993 and 12,020 cars produced


Engine Six cylinders, one overhead camshaft
Valve arrangement 2 valves per cylinder, overhead
Swept volume, eff. 2 960 ccm
Rated power as per 80/1269 EEC 140 kW / 190 DIN HP at 5700 (rpm/min)
Top engine speed 6300/min
Bore/stroke 88.50 x 80.20 mm
Compression ratio 9.2: 1
Rated torque as per 80/1269 EEC 260 Nm at 4500/min
Mixture formation mechan./electronic CIS-E5
closed-loop 3-way catalyst
Crankcase oil capacity max/min 6.5 / 4.5 Liters
Total oil capacity when changing oil and filter 6.8 liters
Cooling system Flat tubular aluminum radiator, plastic fan with fluid coupling

Power output diagram Mercedes-Benz M103 engine

Electrical system

Three-phase alternator 1.4 kW
Battery 12 V 72 Ah

Power transmission

Clutch Single-plate clutch with dual mass flywheel
Transmission 5-speed manual transmission GL 76/27-5
Optional: MB 4-speed torque converter automatic transmission W 4 A 040
Transmission ratios 3.86-2.18-1.38-1.00-0.8-4.151 (5-speed)
3.87-2.25-1.44-1.00-5.59 (automatic)
Rear axle ratio 3.92 (5-speed)
3.29 (automatic)
Body Integral all-steel body, open, with detachable hardtop


Front axle Shock absorber strut independent front suspen- sion with anti-dive control, coil springs on wishbones, gas-filled shock absorbers, negative steering offset, torsion bar stabilizer
Rear axle Multi-link independent rear suspension with anti-squat and anti-lift controls, coil springs, gas-filled shock absorbers, torsion bar stabilizer, level control all round, and electronically controlled damping system (ADS) available as optional extra
Brake system Hydraulic two-circuit brake system with vacuum brake booster
4-piston fixed caliper disc brakes, ventilated, front
2-piston fixed caliper disc brakes, rear
anti-lock braking system (ADS)
Steering MB power steering, 3 steering wheel revolutions from Lock to Lock
Tire size 225/55 R 16 Z
Rim size 8 J x 16

Dimensions and weights

Wheelbase 2515 mm
Track width 1532 mm front
1521 mm rear
Length 4465 mm
Width 1812 mm
Height 1286 mm (ready for driving with hardtop)
Turning circle 10.75 m
Fuel tank capacity 80 liters
Including reserve approx. 10 liters
Curb weight 1650 kg
Gross vehicle weight 2040 kg
Permissible axle loads 940 kg front
1120 kg rear
Permissible trailed load 1500 kg
Power-to-weight ratio 11.78 kg/kW
8.66 kg/DIN HP

Test data

Top speed 228 km/h (5th speed)
Acceleration 0-100 km/h 9.3 sec
1 km with standing start 30.1 sec

Fuel consumption

Urban cycle 15.9 (liters/100 km)
90 km/h 8.5 (liters/100 km)
120 km/h 10.3 (liters/100 km)
According to regulation 80/1268/EEC

Mercedes-Benz SL all roof options