Remove hubcaps before using tire chains.
For mounting, align the hubcap with the groove
to the tire valve and press on all the way around
until it is snapped into place.
Use
Use only in pairs on the rear wheels, equipped
with the tires of the following size:
▷ 225/60 R 18.
▷ 245/50 R 19.
The wheel size and rim offset are located on the
inside of the wheel.
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.
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pressure
has dropped.
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 predefined target
pressures 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 318.
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 tire pressure
loss will be reliable. There is a risk of injury and
risk of damage to property. Ensure that the tire
sizes of the mounted tires are displayed cor‐
rectly and match the details on the tires and on
the vehicle.
Functional requirements
The following conditions must be met for the
system; otherwise, reliable message of a tire
pressure loss is not assured:
▷ Every time a tire or wheel is changed, the
correct details on the mounted tires must be
entered in the tire settings.
▷ The Tire Pressure Monitor does not activate
until after driving for a few minutes:
▷ After a tire or wheel replacement.
▷ After a reset, for tires with special appro‐
val.
▷ After changing the tire setting.
▷ For tires with special approval:
Seite 334
MOBILITY
Wheels and tires
334
Online Edition for Part no. 01405A37CC6 - VI/21
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