2004 Mercedes SL-Class Owner's Manual - Page 402

Technical terms Retractable hardtop Hardtop roof that can be opened and closed at the push of a button and stored in the trunk. Roll bar Occupant protection system which consists of tubular steel sheathed in plastic. The roll bar is lowered into the car body during normal driving conditions and raised automatically. It may also be manually raised and lowered by operating a button during critical driving situations. RON The Research Octane Number for gasoline as determined by a standardized method. It is an indication of a gasoline's ability to resist undesired detonation (knocking). The average of both the MON (Motor Octane Number) and RON (Research Octane Number) is posted at the pump, also known as ANTI-KNOCK INDEX. SBC (Sensotronic Brake Control) Electronically controlled hydraulic braking system for increased braking safety and comfort. Shift lock When the vehicle is parked, this lock prevents the gear selector lever from being inadvertently moved out of position P without SmartKey turned and brake pedal depressed. SRS (Supplemental Restraint System) Seat belts, emergency tensioning device and airbags. Though independent systems, they are closely interfaced to provide effective occupant protection. Tele Aid System (Telematic Alarm Identification on De-mand) The Tele Aid system consists of three types of response: automatic and manual emergency, roadside assistance and information. Tele Aid is initially activated by completing a subscriber agreement and placing an acquaintance call. The Tele Aid system is operational provided that the vehicle's battery is charged, properly connected, not damaged and cellular and GPS coverage is available. Tightening torque Force times lever arm (e.g. a lug wrench) with which threaded fasteners such as wheel bolts are tightened. Tire speed rating Part of tire designation; indicates the speed range for which a tire is approved. 401