Mercedes-Benz 2009 R-Class Operator's Manual page 80

Safety and security
Driving safety systems
G Warning!
®
Never switch off the ESP when you see the
®
ESP warning lamp v flashing in the
instrument cluster. In this case proceed as
follows:
When driving off, apply as little throttle
R
as possible.
While driving, ease up on the accelerator
R
pedal.
Adapt your speed and driving style to the
R
prevailing road conditions.
Failure to observe these guidelines could
cause the vehicle to skid. The ESP
prevent accidents resulting from excessive
speed.
! Only conduct operational or performance
tests on a two-axle dynamometer. If such
tests are necessary, contact an authorized
Mercedes-Benz Center. You could
otherwise seriously damage the brake
system or the transfer case which is not
covered by the Mercedes-Benz Limited
Warranty.
®
! Because the ESP operates
automatically, the engine and ignition must
78
be shut off (SmartKey in starter switch
position 0 or 1 or KEYLESS-GO start/stop
button in position 0 or 1) when the parking
brake is being tested on a brake test
dynamometer. Such testing should be no
longer than 10 seconds.
Active braking action through the ESP
may otherwise seriously damage the brake
system which is not covered by the
Mercedes-Benz Limited Warranty.
®
! The ESP will only function properly if you
use wheels of the recommended tire size
as specified in the "Technical data" section
®
cannot
of this Operator's Manual.
i
The cruise control switches off
automatically when the ESP
For more information, see the "Practical
hints" section ( Y
( Y page 346).
Electronic Traction System (4-ETS)
G Observe Safety notes, see
page 75.
The 4-ETS (four-wheel Electronic Traction
System) are components of the ESP
4-ETS improves the vehicle's ability to utilize
®
®
engages.
page 306) and
®
. The
available traction, especially under slippery
road conditions by applying the brakes to a
spinning wheel. In addition, more power is
transferred to the wheel(s) with traction.
®
When you switch off the ESP
still enabled.
®
Switching off the ESP
G Warning!
®
The ESP should not be switched off during
normal driving other than in the
circumstances described below. Disabling
the system will reduce vehicle stability in
driving maneuvers.
®
Do not switch off the ESP when a spare
wheel is mounted.
To improve the vehicle's traction, switch off
®
the ESP in driving situations in which it
would be advantageous to have the drive
wheels spin and thus cut into surfaces for
better grip such as:
when driving with snow chains
R
in deep snow
R
in sand or gravel
R
, the 4-ETS is