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Safety and Security
Driving safety systems
!
Vehicles without 4MATIC:
®
Because the ESP
operates automatically, the
engine must be turned off (SmartKey in starter
switch position 0 or 1) when
the parking brake is being tested on a brake
test dynamometer
the vehicle is being towed with the front axle
raised
Active braking action through the ESP
otherwise seriously damage the brake system.
For information on vehicles with 4MATIC, see
"Four wheel electronic traction system (4MATIC)
®
with the ESP
" ( page 88).
i
®
The ESP
will only function properly if you
use wheels of the recommended tire size
( page 403).
For more information, see the "Practical
hints" section ( page 327) and
( page 335).
86
Electronic traction system
The electronic traction system is a
component of ESP
The electronic traction system improves
the vehicle's ability to utilize available
traction, especially under slippery road
conditions by applying the brakes to a
spinning wheel.
®
may
When you switch off the ESP
electronic traction system is still enabled.
Warning!
If you are driving too fast, the electronic
traction system cannot reduce the risk of an
accident.
The electronic traction system cannot pre-
vent the natural laws of physics from acting
on the vehicle.
Switching off the ESP
®
.
®
, the
G
To improve the vehicle's traction, turn off
the ESP
would be advantageous to have the drive
wheels spin and thus cut into surfaces for
better grip such as:
!
aforementioned circumstances do not apply
anymore.
®
Warning!
®
The ESP
should not be switched off during
normal driving other than in the circum-
stances described below. Disabling of the
system will reduce vehicle stability in stan-
dard driving maneuvers.
®
Do not switch off the ESP
when a
Minispare wheel is mounted.
®
in driving situations where it
when driving with snow chains
in deep snow
in sand or gravel
®
Switch on the ESP
immediately if the
G
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