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Driving safety systems
70
red brake warning lamp comes on and
warning messages appear in the multifunc-
tion display while driving. To brake, the
driver must then apply significantly greater
brake pedal pressure and depress the pedal
much further to obtain the expected brak-
ing effect. If necessary, apply full pressure
to the brake pedal. Brakes are only applied
to the front wheels. Stopping distance is
increased!
If there is a malfunction in the electro-
hydraulic brake system, we recommend
that the vehicle be transported with all
wheels off the ground using flatbed or
appropriate wheel lift/dolly equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not
to exceed 30 mph (50 km/h). For more
information, see the “Towing the vehicle”
section in this Operator’s Manual.
The electro-hydraulic brake system is auto-
matically activated when you
R
unlock the vehicle with the SmartKey or
with KEYLESS-GO
R
open the driver’s or passenger door
R
turn the SmartKey in the starter switch to
position 1
R
press the start/stop button on the gear
selector lever once (vehicles with KEY-
LESS-GO)
R
depress the brake pedal
R
release the parking brake
If the electro-hydraulic brake system is acti-
vated as the brake pedal is first depressed,
you may feel a reduced pedal resistance and
longer pedal travel than normal. When releas-
ing the pedal, you may also feel the brake
pedal pulsate and you may hear a sound
which is caused by the activation of the elec-
tro-hydraulic brake system pump. This is nor-
mal and not an indication of a malfunction.
Pedal travel returns to normal when you
release the brake pedal and the sound soon
ceases.
If you experience the above while driving and
the red brake warning lamp illuminates
and/or warning messages appear in the mul-
tifunction display, the brake system is mal-
functioning. Follow the instructions of the
warning message(s) and have the brake sys-
tem checked immediately.
G
Warning!
Have brake pad replacement and other
work on the electro-hydraulic brake system
carried out by qualified technicians only.
Contact an authorized Mercedes-Benz Cen-
ter for further information.
The electro-hydraulic brake system must
be deactivated prior to working on the sys-
tem. High pressure is intermittently built up
in the system as part of its automatic self-
test.
In addition, the system is automatically
activated when the vehicle is unlocked by
remote control, when the driver or passen-
ger door is opened, when the SmartKey in
the starter switch is turned to position 1 or
the KEYLESS-GO start/stop button is
pressed once, when the brake pedal is
depressed or when the parking brake is
released. Failure to deactivate the system
prior to maintenance will cause brake pis-
tons to extend and brake fluid to leak,
which may result in injuries (contusions and
acid burns). Extended brake pistons may
also cause injury.
Safety and security