I’m not sure exactly what implementation of iClass you’re referencing (as there’s a few different types), but if you’re talking about the 13.56mhz fobs… they can range from trivial (1 hour of learning and $35-100 in equipment) to impossible.
(I do realize that equipment cost may be prohibitive where you are located).
But, there are attack techniques - especially if people wear these / store them in a pocket or attached to a belt, that can sometimes compromise and copy them. It might not be an innocent accidental bump in that line for coffee!
Newer cars read the outside temperature, and adjust the auto. I don’t know if they sense condensation on the inside. I know that they sense water on the outside to automatically engage wipers.
I have found even the best ones though, to get the rear defrost right, but fail to get front defrost correct in high humidity conditions that aren’t just normal rain. (Very dense fog, snow, sleet ).
Subaru front facing cameras just shut off the eye sight system when the window fogs. The defrost selection is a button, which means it's computer controlled.
In theory the computer knows when it needs defrost.
From my experience:
BMW, Subaru, and Mazda the auto settings are worthless / not functional.
Audi is okay.
The best I’ve found is Infiniti, which 2013 ish on, the auto settings are perfect 99% of the time.
(This of course means, you do have to adjust the temperature setting, but once set the fans spinning up and down are perfect along with the heat moderation. )
BMW could be user error on my part. The longest I’ve used a BMW is 3 weeks, with probably 9 weeks of total usage, and while I tried to get the auto settings to work, on multiple models it was nothing but agony for me.
https://www.classaction.org/media/hinton-v-tesla-inc-et-al.p...
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