2006 Mercedes SL-Class Owner's Manual - Page 456

Technical terms Engine number The number set by the manufacturer and placed on the cylinder block to uniquely identify each engine produced. ESP® (Electronic Stability Program) Improves vehicle handling and directional stability. ETD (Emergency Tensioning Device) Device which deploys in certain frontal and rear collisions exceeding the system's threshold to tighten the seat belts. ->SRS FSS (Canada vehicles) (Flexible Service System) Maintenance service indicator in the multifunction display that informs the driver when the next vehicle maintenance service is due. FSS evaluates engine temperature, oil level, vehicle speed, engine speed, distance driven and the time elapsed since your last maintenance service, and calls for the next maintenance service accordingly. GAWR (Gross Axle Weight Rating) ( page 311) Gear range Number of gears which are available to the automatic transmission for shifting. The automatic gear shifting process can be adapted to specific operating conditions using the gear selector lever. GPS (Global Positioning System) Satellite-based system for relaying geographic location information to and from vehicles equipped with special receivers. Employs CD digital maps for navigation. GVW (Gross Vehicle Weight) ( page 311) GVWR (Gross Vehicle Weight Rating) ( page 311) Head-thorax airbag Installed in the doors, these airbags protect occupants during side impact collisions exceeding a preset threshold. Unlike normal side airbags, head-thorax airbags are also designed to provide protection for the head area. 455