See also:

Keys
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Checking the Battery
Keep the battery clean. Any evidence of corrosion around the battery posts or terminals should be removed using a solution of household baking soda and warm water. After the battery terminals are ...

Smart key
With a smart key, you can lock or unlock a door (and trunk) and even start the engine without inserting the key. The functions of buttons on a smart key are similar to the remote keyless entry. ...