1. Yes. Cost upwards of 2 grand.
2. I believe so. Cost unknown but it may depend on whether you have the big or small display. My reversing sensors cost over £700.
3. No, nowhere near. My average over 16000 miles is 56 mpg. It will not get better than that for me.
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V40 D2 ES - Titanium Grey, Powershift, Winter Pack, Reversing Sensors
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