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Checking using tire inflation pressure
specifications in the tire inflation
pressure table1.Determine the intended tire inflation pres
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Tire pressure values up to 100 mph/
160 km/h
iX xDrive40, iX xDrive50Tire sizePressure specifications
in bar/PSISpecifications in
bar/PSI with cold
tires255/50 R 21 109
Y XL
255/50 R 21 109
H XL A/S
255/50 R 21 109
H XL M+S2.5 / 363.0 / 44235/60 R 20 108
H XL A/S
235/60 R 20 108
H XL
235/60 R 20 108
H XL M+S2.6 / 383.1 / 45275/40 R 22 107
Y XL2.7 / 393.2 / 46iX M60Tire sizePressure specifications in
bar/PSISpecifications
in bar/PSI with
cold tires255/50 R 21 109
H XL A/S
255/50 R 21 109
Y XL
255/50 R 21 109
H XL M+S2.5 / 363.0 / 44275/40 R 22
107 Y XL2.7 / 393.2 / 46
Tire inflation pressures at max.
speeds above 100 mph/160 km/h
Warning
In order to drive at maximum speeds in ex
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Tire pressure values over 100 mph/
160 km/h
iX xDrive40, iX xDrive50Tire sizePressure specifications
in bar/PSISpecifications in
bar/PSI with cold
tires255/50 R 21 109
Y XL2.5 / 363.0 / 44255/50 R 21 109
H XL A/S
255/50 R 21 109
H XL M+S2.8 / 413.3 / 48235/60 R 20 108
H XL A/S
235/60 R 20 108
H XL
235/60 R 20 108
H XL M+S2.9 / 423.4 / 49275/40 R 22 107
Y XL2.7 / 393.2 / 46iX M60Tire sizePressure specifications in
bar/PSISpecifications
in bar/PSI with
cold tires255/50 R 21 109
H XL A/S
255/50 R 21 109
Y XL
255/50 R 21 109
H XL M+S2.8 / 413.3 / 48275/40 R 22
107 Y XL2.9 / 423.4 / 49
Tire marking
Tire size
245/45 R 18 96 Y
245: nominal width in mm
45: cross
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Safety information
Warning
The display of the target pressures is not a substitute for the tire inflation pressure de
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3."Live Vehicle"4."Content"5."Vehicle status"6."Tire Pressure Monitor"7.Make sure that correct tire settings havebeen made.
Tire settings, refer to page 315.8.Turn on drive
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If there is a significant tire pressure
loss
Message A yellow warning light is illuminated in
the instrument cluster.
In addition, an icon with the affected tire ap
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MalfunctionMessage The yellow warning light flashes and is
then illuminated continuously. A Check
Control message is displayed. It may
not be possible to identify tire pressure losses.
Measure
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General information
The system detects tire pressure loss on the
basis of rotation speed differences between
the individual wheels while driving.
In the event of a tire pressure loss, the diame