The temperature grades are A (the highest), B, and C, representing the tire’s resistance to the generation of heat and its ability to dissipate heat, when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance, which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel, than the minimum required by law.
WARNING!
The temperature grade for this tire is established for a tire that is properly
inflated and not overloaded.
Excessive speed, under-inflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
See also:
Initial check
Turning the ignition key to MAR, the multifunction display shows the message
“Check active”: the diagnostic phase of all the electronic systems on the car has
started. This lasts few seconds: if n ...
Fixed passenger seat
Adjusting the reclining seat back
Lift lever A-fig. 52.
...
Device disengagement
Turn the ring (A) to OFF or the ignition key to STOP. The device is automatically
deactivated also in one of the following cases:
❒ pressing the brake or clutch pedal;
❒ ESP or ASR s ...