See also:

Engine block heater (if so equipped)
WARNING: - Do not use your engine block heater with an ungrounded electrical system or a 2-pronged adapter. You can be seriously injured by an electrical shock if you use an ungrounded connec ...

Temperature
A temperature increase will accelerate the rate of corrosion to those parts which are not well ventilated. ...

Brake system
The brake system has two separate hydraulic circuits. If one circuit malfunctions, you will still have braking at 2 wheels. ...