2006 Mercedes SL-Class Owner's Manual - Page 458

Technical terms Overspeed range Engine speeds within the red marking on the tachometer dial, see "Tachometer" ( page 133). Avoid this engine speed range, as it may result in serious engine damage that is not covered by the Mercedes-Benz Limited Warranty. Parktronic (Parking assist)* System which uses visual and acoustic signals to assist the driver during parking maneuvers. Poly-V-belt drive Drives engine-components (alternator, AC compressor, etc.) from the engine. 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 311) Program mode selector switch Used to switch the automatic transmission between standard operation (S) and comfort operation (C). SL 55 AMG with steering wheel gearshift control and manual shift program: In addition to S and C (for regular S or comfort C operation, see above), you can use MANUAL for manual shift program. PSI (Pounds per square inch) ( page 312) Recommended tire inflation pressure ( page 312) 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. 457