OFFICIAL PRESS RELEASE
Stuttgart, Germany, Mar 30, 2010
The technical highlights of the SL-Class
W 121 series (1955 to 1963)
- Modern four-cylinder with overhead camshaft
- Modern chassis for high ride comfort and great safety
- Retractable roadster soft top
W 113 series (1963 to 1971)
- Folding soft top operated with the greatest of ease
- Six-cylinder engine with six-plunger injection pump
- Automatic transmission available in an SL for the first time
- Safety body with stiff passenger cell and deformable front and rear segments
- Numerous other safety features such as an interior designed to reduce injury hazards in accidents and a buckling steering column
- Disc brakes on the front wheels, from 1967 also on the rear wheels
R 107 series (1971 to 1989)
- Further developed safety body
- Frame-floor unit with differing metal thicknesses to produce a carefully defined crumple pattern
- Sturdy roll-over protection: high-strength A-pillars and windscreen frame with bonded glass
- Special air ducting on the doors ensuring reduced soiling of the side windows and mirrors
- Contactless transistorised ignition, Bosch K-Jetronic, hydraulic valve play compensation (1975)
- First SL with catalytic converter (1985)
R 129 series (1989 to 2001)
- Automatic roll-over bar (deploying time: 0.3 seconds)
- Extremely sturdy integral seats
- Coefficient of drag 0.32 (with hardtop)
- Fully automatic electro-hydraulic folding soft top
- World premiere of the draught-stop
- Adaptive Damping System ADS (optional)
- Fixed-calliper disc brakes
- First twelve-cylinder engine in an SL (1992)
- Electronic Stability Program ESP® (1995)
- Brake Assist BAS (1996)
- Cruise control effective even in 30 km/h zones (1996)
R 230 series (from 2001)
- Vario-roof with ingenious swivelling mechanism and 16 seconds folding time
- Sensor-controlled roll-over bar fully operable even with the vario-roof closed
- Electro-hydraulically controlled braking system Sensotronic Brake Control (SBC™)
- Suspension with Active Body Control ABC
- New type of head/thorax airbags in the doors
- Coefficient of drag 0.29 (closed vehicle)
- Use of lightweight components for best fuel economy
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