Skoda Octavia Owner's Manual page 163

162 Intelligent Technology
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Changes to vehicle (e.g. on engine, on the brakes, on chassis or another combi-
nation of tyres and wheels) can influence the function of the ESP  page 204,
"Accessories, changes and replacement of parts".
Electronic Differential Lock (EDL and XDL)
The electronic differential lock prevents an individual wheel from
slipping.
General
The EDL 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 EDL is activated automatically, that is without any action on the part of the
driver. It monitors the speeds of the driven wheels with the aid of the ABS sensors.
Should only one drive wheel begin spinning on a slippery surface there will be an
appreciable difference in the speed of the driven wheels. The EDL function brakes
the slipping wheel and the differential transmits a greater driving force to the other
driven wheel. This control process is also accompanied by noises.
Overheating of the brakes
The EDL switches off automatically if unusually severe stresses exist in order to
avoid excessive heat generation in the disc brake on the wheel which is being
braked. The vehicle can continue to be driven and has the same characteristics as a
vehicle not fitted with EDL.
The EDL switches on again automatically as soon as the brake has cooled down.
XDL function (only for Octavia RS)
The XDL function is an extension to the electronic differential lock. The XDL func-
tion does not respond to traction, but to the relief of the inner front wheel during
fast cornering. An active brake intervention on the brake of the inner wheel
prevents it from spinning. Thus, the traction is improved and the vehicle continues
to follow the desired track.
WARNING
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Carefully depress the accelerator when accelerating on uniformly slippery
road surfaces, such as ice and snow. The driven wheels might still spin despite
the EDL and affect the stability of the vehicle - risk of an accident!
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You should always adapt your style of driving to the condition of road surface
and to the traffic situation even when your vehicle is fitted with EDL. The
WARNING (continued)
increased safety offered must not tempt you to take greater risks than other-
wise - risk of an accident!
Note
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If the ABS or ESP warning light comes on, this may also indicate a fault in the
EDL. Have the vehicle inspected by your specialist garage as soon as you can.
•
Changes to vehicle (e.g. on engine, on the brakes, on chassis or another combi-
nation of tyres and wheels) can influence the function of the EDL  page 204,
"Accessories, changes and replacement of parts".
Traction control system (TCS)
The traction control system prevents the driven wheels from spin-
ning 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
automatically adapted by reducing the engine speed. The system operates at all
speeds.
The TCS operates in combination with the ABS  page 164, "Antilock brake system
(ABS)". The TCS will not function if a fault exists in the ABS system.
Fig. 152 TCS switch