S3 E-Type

For Cold Climates Jaguar offered a block heater to keep your pussy warm at night, so to speak.

It fits on the water-pump extension (seen here upside down):

This extends forward from teh water pump, see this article (about halfway down) for a different view of the water pump.

It's got ~3 meters of standard cable with a 110V plug on the end. In this pic you can make out the flex on the floor and see the heater element inside the elbow:
just to be clear: engine is out of the car and upside down in these pics!