BMW is to introduce a stop-start system - which cuts the engine when stopped and restarts it when the driver's foot comes off the brake - from next year.
Various four- and six-cylinder 1-series, 3-series and 5-series models will use a Bosch-developed system, which promises fuel savings of around five per cent. It will be the first time an upmarket manufacturer has offered such a device.
Despite slow sales of Citroën's C2 and C3 Stop & Start, car makers are keen on such systems as they are an easy way to reduce emissions to meet self-imposed C02-reduction targets.
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