2009 Mercedes C-Class Owner's Manual - Page 209

219_AKB; 4; 54, en-US d2ureepe, 2009-05-11T16:21:02+02:00 - Seite 207 Version: 2.11.8.1 Tires and wheels Maximum permissible tire inflation pressure This number is the greatest amount of air pressure that should ever be put in the tire. 207 Sidewall The portion of a tire between the tread and the bead. Normal occupant weight The number of occupants the vehicle is designed to seat, multiplied by 68 kilograms (150 lb). TIN (Tire Identification Number) Unique identifier which facilitates efforts by tire manufacturers to notify purchasers in recall situations or other safety matters concerning tires and gives purchasers the means to easily identify such tires. The TIN is comprised of "Manufacturer's identification mark", "Tire size", "Tire type code" and "Date of manufacture". Occupant distribution The distribution of occupants in a vehicle at their designated seating positions. Production options weight The combined weight of those installed regular production options weighing over 5 lbs (2.3 kilograms) in excess of those standard items which they replace, not previously considered in curb weight or accessory weight, including heavy duty brakes, ride levelers, roof rack, heavy duty battery, and special trim. Tire ply composition and material used This indicates the number of plies or the number of layers of rubber-coated fabric in the tire tread and sidewall. Tire manufacturers also must indicate the ply materials in the tire and sidewall, which include steel, nylon, polyester, and others. Tire speed rating Part of tire designation (speed symbol); indicates the speed range for which a tire is approved. PSI (Pounds per square inch) A standard unit of measure for air pressure. Recommended tire inflation pressure The recommended tire inflation pressure for normal driving conditions is listed on the Tire and Loading Information placard located on the driver's door B-pillar. It provides best handling, tread life and riding comfort. Supplemental information pertaining to special driving situations can be found on the tire inflation pressure label on the inside of the fuel filler flap. Total load limit Rated cargo and luggage load plus 68 kilograms (150 lb) times the vehicle's designated seating capacity. Traction The adhesive friction of a tire on a surface on which it moves. The amount of grip provided. Tread The portion of a tire that comes into contact with the road. Rim A metal support for a tire or a tire and tube assembly upon which the tire beads are seated. Z Operation