Quote:
Originally Posted by kryten 
This auto function is in place so that the extra electrical load on the alternator makes the engine work slightly harder so speeding up warm up time and lowering emissions as well and as diesels take longer to warm up thats why only diesel engined models have this function
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I'm sorry I'm not sure that makes sense to me. Thats like saying turn all your lights and air con on and it'll lower emissions because the engine's working harder.
I do realise that the emissions are directly affected by the rate that the engine warms up but deliberately forcing the engine to work harder to achieve it seems a negative way of doing it.