Intellig e nt t e chnology
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Electronic differential lock (EDL)
The elec tronic differen tial lock monitors the rotational
speed of the drive wheels.
G e n e ra l not es
The electronic differe ntia l lock (EDL) helps the ca r to sta rt moving,
accelerate and climb a gradient on surfaces provid ing poor or almost
no grip . Without EDL, this would be d iff icult, if not impossible.
How the sy stem works
The EDL operates automatically. It mo nitors the rota t ional speed of
wheels with the help of the ABS sensors=>
page 233. If a not iceab le
slip is detected at the wheels (e.g . on slippery g round on one side),
the spinn ing wheels are braked and power is transferred to the other
wheels . This is done up to a speed of about 60 mph (100 km/h).
Noises from the brake system signal that wheel sp in is being
controlled.
Driv ing off
When d riving off, always be sure to keep road conditions in mind as
you accelerate. If one drive wheel spins because it is on a surface with
less grip, apply
plenty of throttle until the car starts to move.
O v erheating of bra kes
To prevent t he disc brake of the bra ked wheel from ove rhea t ing if
subjected to excessive loads on this wheel, the EDL cuts out tempo-
ra rily. The vehicle remains operat io nal and be haves in the same way
as a veh icle without EDL.
As soon as the brake has coo led down, EDL switches on again auto -
matically.
Electronic limited slip differential
In vehicles w ith front wheel drive *, an e lectron ic lim ited slip d ifferen-
tial engages when driving on curves . The brakes are applied spec ifi-
cally to the front wheel that is on the inside of the curve. This m ini-
m izes sliding on the front wheels and enables precise and neutral
driving t hrough curves . The electronic lim ited slip differentia l does
no t e ngage whe n d riving in wet cond it ions or snow.
& WARNING
• Wh en accelerating on slippery surfaces, such as on ice or snow,
always be careful when depre ssing the accelerator pedal. Even
with the EDL and the electroni c limited slip differential working,
the dr ive wh eels can spin and reduce your ability to control your
car. Risk of crash!
• The increased safet y afforded by EDL and the electronic limited
slip differ ential does not mean th at you can take safety risks.
Alw ays adapt your driving style to the road conditions and traffi c
sit uation.
[ i ] Tips
If a fa ult occurs in the ABS, the EDL is also not funct ioning. This is
ind icated by the ABS warn ing light=>
page 15 . •
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the driven
wheels from spinning when the car is accelerating.
General notes
The Anti-Slip Regu lation System (ASR) is int egrated in the electronic
stabilization program (ESP). When the veh icle starts up and acceler-
at es, t he wheels are preven t ed from sp inning by adjust ing the engine
power to match the amount of grip ava ilable from the road surface.
How the system works
ASR performs automatica lly, i.e. without the driver's intervent ion.
With the a id of the ABS sensors =>
page 233, ASR moni t ors the speed
of the driven wheels. If the wheels start to spin, engine torque is
reduced automatically unti l the tires find enough grip to lock onto
the road surface. The system is active across the entire speed range . .,
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