AFAIK it comes standard in the 4.6is. Heated seats and heat/cooling air from the rear of the floor console makes passengers happy on cold days... A warm tookas is a groovy thing.....

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2002 X5 4.6is, Black Sapphire on Black
1997 328is, Black on Gray
2003 SL500, Black on Gray
UH-1H Helicopter, Yellow