▷ 225/55 R 17.
▷ 245/45 R 18.
▷ 245/40 R 19.
Follow the tire chain manufacturer's instructions.
Do not initialize the Flat Tire Monitor after
mounting tire chains, as doing so may result in
incorrect readings.
Do not reset the Tire Pressure Monitor after
mounting tire chains, as doing so may result in
incorrect readings.
When driving with tire chains, briefly activate Dy‐
namic Traction Control DTC to optimize the
drive power.
Maximum speed with tire chains
Do not exceed a speed of 30 mph/50 km/h when
using tire chains.
Rear axle steering during
operation with snow chains
General information
In order to guarantee free running of the wheels
when operating with tire chains, rear axle steer‐
ing of the integral active steering must be
switched off when tire chains are mounted.
Safety information
Warning
When rear axle steering is switched on and tire
chains are mounted, there can be contact be‐
tween tire chains and the chassis. There may
be a risk of accident or risk of damage to prop‐
erty. With mounted tire chains, switch off the
rear axle steering.
Switching off rear axle steering
The rear axle steering is switched off by specify‐
ing that tire chains are installed.
1.
"CAR"
2. "Settings"
3. "General settings"
4. "Tire chains"
5. "Tire chains installed"
Starting with the permissible maximum speed
with snow chains of 30 mph/50 km/h the rear
axle steering will be switched on again automati‐
cally.
Tire pressure monitor
Concept
The system monitors tire inflation pressure in the
four mounted tires. The system warns you if
there is a loss of pressure in one or more tires.
General information
Sensors in the tire valves measure the tire infla‐
tion pressure and tire temperature.
Using the tire settings in iDrive, the system can
automatically compare the specified target pres‐
sures with the actual tire inflation pressures.
If tires are being used that are not specified on
the tire inflation pressure details on the vehicle,
such as tires with special approval, the system
needs to be actively reset. The system will then
take over the actual tire inflation pressures as the
target pressures.
When operating the system, also note the infor‐
mation found in the Tire inflation pressure chap‐
ter.
Additional information:
Tire inflation pressure, refer to page 320.
Seite 337
Wheels and tires
MOBILITY
337
Online Edition for Part no. 01405A2C7F8 - II/21
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