2009 Mercedes SLR McLaren Owner's Manual - Page 406

Technical terms Power train Collective term designating all components used to generate and transmit motive power to the drive axles, including engine clutch/torque converter transmission transfer case drive shaft differential axle shafts/axles Production options weight ( page 287) Program mode selector switch Used to switch the automatic transmission between sport operation (S), comfort operation (C) and manual operation (MAN). PSI (Pounds per square inch) ( page 288) Recommended tire inflation pressure ( page 288) REST (Residual Engine Heat Utilization) Feature that uses the engine heat stored in the coolant to heat the vehicle interior for a short time after the engine has been turned off. Rim ( page 288) 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. Electro-hydraulic brake system 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 park position P without SmartKey turned and brake pedal depressed. Sidewall ( page 288) SRS (Supplemental Restraint System) Seat belts, Emergency Tensioning Device (ETD) and air bags. Though independent systems, they are closely interfaced to provide effective occupant protection. 406