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Safety and Security
Driving safety systems
PRE-SAFE
®
Brake* (vehicles with
DISTRONIC Plus* only)
PRE-SAFE
®
Brake* can assist you in mini-
mizing the risk of a rear-end collision with
a vehicle in front of you and in reducing the
severity of an accident. At speeds over ap-
prox 20 mph (30 km/h), it will
ț warn you of a possible collision
ț automatically begin to brake the vehi-
cle lightly in a speed range of up to
112 mph (180 km/h)
ț activate preventative occupant safety
measures (PRE-SAFE
®
) (୴ page 56)
Warning! G
If you see the ESP
®
warning lamp v
flashing in the speedometer, proceed as fol-
lows:
ț While driving off, apply as little throttle
as possible
ț While driving, ease up on the accelera-
tor
ț Adapt your speed and driving style to
the prevailing road conditions
Failure to observe these guidelines could
cause the vehicle to skid.
The ESP
®
cannot prevent accidents result-
ing from excessive speed.
!
Do not tow with one axle raised.
Otherwise the transfer case can be damaged,
which is not covered by the Mercedes-Benz Lim-
ited Warranty.
!
Performance testing must only be conduct-
ed on a two-axle dynamometer.
Otherwise the transfer case can be damaged,
which is not covered by the Mercedes-Benz Lim-
ited Warranty.
!
Because the ESP
®
operates automatically,
the engine and the ignition must 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.
Active braking action through ESP
®
may other-
wise seriously damage the front or rear axle
brake system.
Operational tests with the engine running can
only be conducted on a two-axle dynamometer.
Warning! G
PRE-SAFE
®
Brake is a convenience system
designed to assist the driver during vehicle
operation. The responsibility for the vehicle
speed and the distance to the vehicle ahead,
including most importantly brake operation
to assure safe stopping distance, always re-
mains with the driver.