fuel consumption CITROEN C-ELYSÉE 2014 Handbook (in English)

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C-ELYSEE_EN_CHAP07_SECURITE_ED01-2014
Safety
Under-infl ation detection
The under-inflation detection system does not replace the vigilance or the responsibility of the driver. This system does not avoid the need to check the tyre pressures (including the spare wheel) every month as well as before a long journey. Driving with under-inflated tyres impairs road holding, extends braking distances and causes premature tyre wear, particularly under arduous condition (high loading, high speed, long journey).
The inflation pressures defined for your vehicle can be found on the tyre pressure label. See the "Identification markings" section. Tyre pressures should be checked when the tyres are "cold" (vehicle stopped for 1 hour or after a journey of less than 6 miles (10 km) at moderate speeds). Other wise (when hot), add 0.3 bar to the pressures shown on the label.
Driving with under-inflated tyres increases fuel consumption.
System which automatically checks the pressures of the tyres while driving.
The system monitors the pressures in the four tyres, once the vehicle is moving. It compares the information given by the four wheel speed sensors with reference values, which must be reinitialised ever y time the tyre pressures are adjusted or a wheel changed . The system triggers an alert as soon as it detects a drop in the inflation pressure of one or more tyres.