Engine Block Heater
WARNING: This page is about a different car, the 2009 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
The block heater is operated by ordinary house current (110 Volt A.C.) through a power cord and connector located in the engine compartment. The heater is mounted in a core hole (in place of a core hole plug) in the engine block, with the heating element immersed in coolant.
CAUTION:
The power cord must be secured in its retainer clips, and not positioned so it could contact linkages or exhaust manifolds and become damaged.