2005 Mercedes E-Class Owner's Manual - Page 477

Technical terms PTC heating element (Positive Temperature Coefficient) Electronic component that warms up quickly as electricity is supplied to it and is used as a ->heater booster system in diesel vehicles. Restraint systems Seat belts, belt tensioners, air bags and child restraint systems. As independent systems, their protective functions complement one another. RON (Research Octane Number) 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 transmission selector lever from being moved out of position P without the ignition or engine on and brake pedal depressed. SRS (Supplemental Restraint System) Seat belts, emergency tensioning device and air bags. Though independent systems, they are closely interfaced to provide effective occupant protection. Tele Aid System (Telematic Alarm Identification on Demand) 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. Telematics* A combination of the terms "telecommunications" and "informatics". Tightening torque Force times lever arm (e.g. a lug wrench) with which threaded fasteners such as wheel bolts are tightened. 475