Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half (11⁄2) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices, and differences in road characteristics and climate.
See also:
Vehicle storage
If you plan on storing your vehicle for an extended period of time
(30 days or more), refer to the following maintenance recommendations
to ensure your vehicle stays in good operating condition.
...
Determining if the system is operational
The supplemental restraint system uses a warning indicator light in the
instrument cluster or a backup tone to indicate the condition of the
system. Refer to the Warning lights and chimes section ...
Central locking/Two-stage unlocking
When unlocking the driver door with the key, turn it once toward the
rear of the vehicle to unlock that door only, if the two-stage unlocking is
enabled. Turn the key a second time to unlock all d ...