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Do not reset the Tire Pressure Monitor TPM
after mounting snow chains, as doing so may
result 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 wheel steering is switched on
and snow chains are mounted, there can be
contact between snow chains and the chassis.
There is a risk of accidents or risk of property
damage. With mounted snow chains, switch
off the rear wheel steering.◀
Switching off rear wheel steering
The rear wheel steering is switched off by
specifying that snow chains are installed.
Via iDrive:
1.
"My Vehicle"
2. "Vehicle settings"
3. "Tire chains"
4. "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 auto‐
matically.
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 in‐
flation pressure and tire temperature.
When operating the system, also note the ad‐
ditional information found in the Tire inflation
pressure, refer to page 290, chapter.
Functional requirements
The following conditions must be met for the
system; otherwise, reliable flagging of a loss of
tire inflation pressure is not assured:
▷ After a tire or wheel replacement, a reset
was performed with the correct tire infla‐
tion pressure.
▷ After the tire inflation pressure was ad‐
justed to a new value, a reset was per‐
formed.
▷ Wheels with TPM wheel electronics.
Status display
Current status
The system status can be displayed on the
Control Display, e.g., whether or not the sys‐
tem is active.
Using iDrive:
1.
"My Vehicle"
2. "Vehicle status"
3. "Tire Pressure Monitor"
The current status is displayed.
Current tire temperature
Depending on the model, the current tire tem‐
peratures are displayed.
Seite 302
Mobility Wheels and tires
302
Online Edition for Part no. 01402981865 - VI/17
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