I ran across this earlier this month, look for the posts by merlinTec:

http://www.jeepforum.com/forum/showthre ... ght=heater

Pay special attention to post #10.

Lewis

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Mail Rated 2005 Red CRD Sport with large rectangular hole in top right behind the EVIC and above the heated leather seats.
2004 Jetta TDI

Yeah -bbo posted pictures and part numbers
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?p=381162#381162

heater plug is definitely larger - that should translate to a better seal
none of my online part places show the new part number.

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2005 CRD
stuff
Skeptic quod gratis asseritur, gratis negatur