VW fitted something like these heaters to their 411 models. Really nice feature but the system had a small problem with run away fueling resulting in a very hot car. (Read burnt out shell.) I remember coming out from a Christmas function where there had been a surprise snow storm and within a minute my 411 was defrosted, warm and driving home.

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2015 X5 xDrive35i MSport
2013 X5 xDrive35i