GETTING TO KNOW YOUR CAR
121
TC and ASR FUNCTIONS
The TC (Traction Control) and ASR
(Anti Slip Regulation), integrated in the
ESP system, prevent drive wheel slip
in poor grip conditions.
Two different control systems inter-
vene:
– if both drive wheels slip because of
excessive power, the ASR system re-
duces the engine power;
– if only one drive wheel slips, the TC
function brakes the slipping wheel as
a self-locking differential would do.
The TC and ASR functions are par-
ticularly useful in the following condi-
tions:
– inside wheel slipping due to load
variations and excessive acceleration;too much power to the wheels de-
pending also on the road conditions;
– acceleration on snowy or icy roads;
– wet road grip loss.
The TC and ASR system
performance, in terms of
active safety, should not
make the driver run useless risks.
Driving must suit road condi-
tions, visibility and traffic. Never-
theless it is always the behaviour
of the driver that determines
road safety.
Cars with TC and ASR
functions may only be fit-
ted with tyres of the same
make, model and size and be in
good conditions.IMPORTANTWhen travelling on
snowy roads with the snow chains ap-
plied, we suggest turning the ESP sys-
tem off and switching on the TC and
ASR functions, so that the drive action
is increased in the event the drive
wheels slip.
MSR FUNCTION
The MSR (Motor Schleppmoment
Regelung) function controls automat-
ically the engine braking torque while
shifting the gears. In the event of sud-
den gear shifting, this function prevents
the drive wheel dragging, especially in
poor grip conditions, and restores the
vehicle stability.
