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Do not initialize the Flat Tire Monitor after
mounting snow chains, as doing so may result in
incorrect readings.
Do not reset the Tire Pressure Monitor TPM af‐
ter mounting snow chains, as doing so may re‐
sult in incorrect readings.
When driving with snow chains, briefly activate
Dynamic Traction Control DTC to optimize the
forward momentum.
Maximum speed with snow
chains
Do not exceed a speed of 30 mph/50 km/h when
using snow chains.
Rear axle steering during
operation with snow chains
General information
In order to guarantee free running of the wheels
when operating with snow chains, rear axle
steering of the integral active steering must be
switched off when snow chains are mounted.
Safety information
Warning
When rear axle steering is switched on and
snow chains are mounted, there can be contact
between snow chains and the chassis. There
may be a risk of accident or risk of damage to
property. With mounted snow chains, switch off
the rear axle steering.
Switching off rear axle steering
The rear axle steering is switched off by specify‐
ing that snow chains are installed.
Via iDrive:
1.
"CAR"
2. "Settings"
3. "General settings"
4. "Tire chains"
5. "Snow 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 TPM
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 display the specified target pres‐
sures and compare them with the actual tire in‐
flation pressures.
If tires are being used that are not specified on
the tire inflation pressure details on the vehicle,
refer to page 328, such as tires with special ap‐
proval, the system needs to be actively reset.
The system will then take over the actual tire in‐
flation pressures as the target pressures.
When operating the system, also note the addi‐
tional information found in the Tire inflation pres‐
sure, refer to page 328, chapter.
Safety information
Warning
The display of the target pressures is not a
substitute for the tire inflation pressure details
on the vehicle. Incorrect entries in the tire set‐
tings can lead to incorrect target tire inflation
pressure values. In this case, it cannot be guar‐
anteed that the notification of a loss of tire infla‐
tion pressure will be reliable. There is a risk of
injury and risk of damage to property. Ensure
Seite 343
Wheels and tires
MOBILITY
343
Online Edition for Part no. 01402720932 - II/19
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