184 Vehicle careTyre designationsE.g. 195/65 R 15 91 H195 = Tyre width, mm65 = Cross-section ratio (tyreheight to tyre width), %R = Belt type: RadialRF = Type: RunFlat15 = Wheel diameter, inches91 = Load index e.g. 91 isequivalent to 615 kgH = Speed code letterSpeed code letter:Q = up to 100 mphS = up to 112 mphT = up to 118 mphH = up to 130 mphV = up to 150 mphW = up to 168 mphTyre pressureCheck the pressure of cold tyres atleast every 14 days and before anylong journey. Do not forget the sparewheel. This also applies to vehicleswith tyre deflation detection system.Unscrew the valve cap.Tyre pressure 3 217 and on the labelat the front passenger door.The tyre pressure data refers to coldtyres. It applies to summer and wintertyres.Always inflate the spare tyre to thepressure specified for full load.The ECO tyre pressure serves toachieve the smallest amount of fuelconsumption possible.Incorrect tyre pressures will impairsafety, vehicle handling, comfort andfuel economy and will increase tyrewear.9 WarningIf the pressure is too low, this canresult in considerable tyre warm-up and internal damage, leading totread separation and even to tyreblow-out at high speeds.If the tyre pressure must be reducedor increased on a vehicle with tyrepressure monitoring system, switchoff ignition.Tyre deflation detectionsystemThe tyre deflation detection systemcontinually checks the rotation speedof all four tyres.If a tyre loses pressure the controlindicator w illuminates yellow and awarning message is displayed in theDriver Information Centre withUplevel-Display. Stop immediatelyand check tyre pressure.Control indicator w 3 94.
