Re: Should I get the Engine Block Heater ??
For 2011-2013 WK's with 5spd transmission, there is no available 'block heater' per se. The provision to mount the heating element into the block is not present.
For 2014MY the block has the provision for mounting the heating element, but the only one available is a 110v unit for North American markets. For all not-US/Canada applications, there is a plug installed where the element goes on the US/Can models.
In Europe you might consider the Webasto unit which is generally awesome for cabin warmth in cold climates.