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Traction control system (TCS)
The traction control system prevents the driven wheels from spinning
when accelerating.
General
The TCS makes it much easier, and sometimes at all possible, to start off, accelerate and
climb a steep hill when the conditions of the road surface are unfavourable.
Operating principle
The TCS switches on automatically when the engine is started and then conducts a
self-test. The system monitors the speeds of the driven wheels with the aid of the ABS
sensors. If the wheels are spinning, the force transmitted to the road surface is auto-
matically adapted by reducing the engine speed. The system operates at all speeds.
The TCS operates in combination with the ABS page 167, "Antilock brake system
(ABS)". The TCS will not function if a fault exists in the ABS system.
The TCS warning light lights up in the instrument cluster when there is a fault on the
page 33.
TCS
During an intervention of the system, the TCS warning light
ment cluster page 33.
Switching off
You can switch the TCS off and on again as you wish. On vehicles fitted with ABS, you
can switch off the TCS by pressing the button
you can switch off the TCS with the aid of the button
Using the system
Safety
Fig. 147 TCS switch
flashes in the instru-
fig.
147, on vehicles fitted with ESP*,
page 163, fig.
146. The TCS
Driving Tips
warning light lights up in the instrument cluster when the system is switched off
page 33.
The TCS should normally always be switched on. It may be good practice in certain
exceptional cases, such as when you wish to have wheel slip, to switch off the system.
Examples:
when driving with snow chains
when driving in deep snow or on a loose surface
when it is necessary to rock a vehicle when it has become stuck.
then you should switch on the TCS again.
TCS Off-road*
After switching on the Off-road mode page 170, TCS Off-road is activated.
TCS Off-road provides a more effective acceleration of the vehicle on an unfirm
ground, as it allows higher traction between the slipping wheels and the ground.
The system operates when starting off or at low speeds.
WARNING
You should always adjust your style of driving to the conditions of the road
surface and the traffic situation. The increased safety offered must not tempt
you to take greater risks than otherwise - risk of an accident!
Note
All four wheels must be fitted with the same tyres in order to achieve problem-free
operation of the TCS. Differing rolling circumferences of the tyres can lead to an unde-
sirable reduction in the engine output.
Changes to vehicle (e.g. on engine, on the brakes, on chassis or another combina-
tion of tyres and wheels) can influence the function of the TCS page 222, "Accesso-
ries, changes and replacement of parts".
General Maintenance
Breakdown assistance
Intelligent Technology
165
Technical Data
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