It does not matter whether it is tiptronic or manual trans. it is a good idea. I have the IMS Guardian which monitors for metal and the beauty of the latter is a light and a warning sound come on in the dash if there is sufficient metal between the points on the pigtail plug sensor.
Of course with a magnetic plug you have to take it out to check for metal which is a pita. I am not ashamed of pushing Jake Raby's products if they can give me peace of mind and avert a disaster.
Cheers, Guy
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