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The sensor function may be impaired in the events of one of the following.
▶
The sensor cover is soiled (e.g. with mud, snow etc.).
▶
The area in front of and around the sensor cover is obscured (e.g. by labels,
auxiliary headlights etc.).
▶
When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
If the sensor is covered or dirty, the corresponding message appears in the in-
strument cluster display for the ACC system» page 189, Malfunctionsor Front
Assist system » page 191, Malfunctions.
WARNING
■
If you suspect that the sensor is damaged, deactivate the ACC system
and Front Assist system» page 186, » page 191. Have the sensor checked
by a specialist garage.
■
A collision or damage in the front or lower area of the vehicle could affect
the sensor function - there is risk of accident! Have the sensor checked by
a specialist garage.
■
Do not cover the area in front of and around the sensor cover. This can
lead to impaired function of the sensor - risk of accidents!
CAUTION
Remove the snow with a brush and the ice with a solvent-free de-icer.
Braking and stabilisation systems
Introduction
The brake and stabilization systems are automatically activated each time the
ignition is switched on, unless otherwise indicated.
The error display is in Chapter » page 37, Warning lights.
WARNING
The general information relating to the use of assistance systems must be
observed » page 174, in section Introduction.
Stability Control (ESC)
Read and observe on page 175 first.
ESC improves vehicle stability in critical driving situations (e.g. if the vehicle
starts to skid) by the braking the individual wheels to maintain the direction.
If there is a TCS intervention, the indicator light flashes in the instrument
cluster.
Anti-lock brake system (ABS)
Read and observe on page 175 first.
ABS prevents the wheels locking when braking. Thereby, it helps the driver to
maintain control of the vehicle.
An ABS intervention can be noticed through pulsating movements of the
brake pedal and distinct noises.
When the ABS system is active, do not pump the brakes or lift off the brake
pedal.
Engine drag torque control (MSR)
Read and observe on page 175 first.
MSR counteracts the tendency of the drive wheels to lock during downshifts
or sudden deceleration (e.g. on icy or an otherwise slippery road surface).
If the drive wheels should lock, then the engine speed is automatically in-
creased. This reduces the braking effect of the engine and the wheels can ro-
tate freely again.
175
Assist systems
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