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Safety and Security
Driving safety systems
!
®
Because of the ESP
's automatic oper-
ation, the engine must be shut off
(SmartKey in starter switch position 0
or 1 or KEYLESS-GO* start/stop but-
ton in position 0 or 1) when
the parking brake is being tested on
a brake test dynamometer
the vehicle is being towed with the
front/rear axle raised
Active braking action through the ESP
may otherwise seriously damage the
brake system.
®
The ESP
will only function properly if
you use wheels of the recommended
tire size ( page 434).
For more information, see the
"Practical hints" section ( page 332).
86
®
Switching off the ESP
Warning!
®
ESP
should not be switched off during nor-
mal driving other than in the circumstances
described below. Disabling of the system
will reduce vehicle stability in standard driv-
ing maneuvers.
Do not switch off the ESP
wheel is mounted.
®
To improve the vehicle's traction, turn off
®
the ESP
in driving situations where 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
in deep snow
in sand or gravel
!
Turn on the ESP
G
aforementioned circumstances do not
apply anymore.
When you switch off the ESP
the ESP
the engine output is not limited, which
allows the drive wheels to spin and
®
when a spare
thus cut into surfaces for better grip
the traction control will still brake a
spinning wheel
the ESP
you are braking
you cannot activate Distronic*
i
When the ESP
or more drive wheels are spinning, the
ABS/ESP
speedometer flashes. However, the
ESP
®
immediately if the
®
®
does not stabilize the vehicle
®
continues to operate when
®
is switched off and one
®
warning lamp v in the
®
will then not stabilize the vehicle.
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