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Starting and driving
Stability system
When the stability system
1
is in action, it may
seem like the car does not respond normally
to acceleration. This is because the system
detects the amount of friction on the road
surface and allows the different stability
system functions to operate.
The car is either equipped with STC (Stability
and Traction Control) – Stability and traction
control system or DSTC (Dynamic Stability
and Traction Control) – Dynamic stability and
traction control system.
See page 39 for further information on warn-
ing symbols in the combined instrument
panel.
Traction Control (TC)
The Traction Control function transfers
power from the spinning drive wheel to the
drive wheel which has grip. To increase for-
ward traction in this situation, it may be nec-
essary to depress the accelerator more than
usual. A pulsing sound is heard when Trac-
tion Control is working. This is completely
normal. The TC function is most active at low
speeds. It cannot be deactivated.
Spin Control (SC)
The Stability Control function prevents the
drive wheels from slipping during accelera-
tion. This improves road safety on slippery
surfaces. Under certain conditions, such as
when driving with snow chains or in deep
snow or sand, it may be beneficial to deacti-
vate the SC function to increase traction. This
is done with the STC/DSTC button.
Active Yaw Control (AYC)
The Active Yaw Control function automati-
cally brakes one or more wheels to stabilise
the car in the event of a skid. If the brake
pedal were to be depressed in this situation,
it would feel more rigid than usual and a puls-
ing sound would be heard.
The AYC function is always active and cannot
be deactivated.
Active chassis – FOUR-C
2
The car is equipped with an extremely
advanced active chassis system – Continu-
ously Controlled Chassis Concept – that is
regulated electronically. The functions of the
system are based on a number of sensors
that continually monitor the car’s movements
and reactions, such as vertical and lateral
acceleration, vehicle speed and wheel move-
ments.
The FOUR-C control unit analyses data from
the sensors and performs the necessary
shock absorber setting adjustments up to
500 times per second. This results in
extremely fast and accurate individual shock
absorber control, which contributes to varia-
tions in chassis characteristics.
Chassis characteristics can be modified at
any time while driving, when the nature of the
road changes or when you desire a change in
driving style. This change occurs in a matter
of milliseconds.
The effect produced by pressing the acceler-
ator pedal is linked to your choice of chassis
characteristics. (only applies to R-models).
1. Option on certain markets.
Function/ system STC
DSTC
1
1. Option on certain markets.
TC X X
SC X X
AYC X
WARNING!
Suppressing the STC or DSTC system
may alter the driving characteristics of the
car. Always take care when cornering and
driving in slippery conditions.
2. Option in certain markets. Standard
on S60 R.