Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt resi-
due may form on the brake discs and brake
pads. This can result in a significantly longer
braking distance.
R
In order to prevent any salt build-up, apply the
brakes occasionally while paying attention to
the traffic conditions.
R
Carefully depress the brake pedal and the
beginning and end of a journey.
R
Maintain a greater distance to the vehicle
ahead.
Servicing the brakes
!
The brake fluid level may be too low, if:
R
if the red brake warning lamp lights up in
the instrument cluster and
R
you hear a warning tone while the engine is
running
Observe additional warning messages in the
multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked immediately.
Consult a qualified specialist workshop to
arrange this.
!
Vehicles with 4MATIC: function or per-
formance tests may only be carried out on a 2-
axle dynamometer. If you wish to operate the
vehicle on such a dynamometer, please con-
sult a qualified specialist workshop in
advance. You could otherwise damage the
drive train or the brake system.
!
Vehicles with 4MATIC: the ESP
®
system
operates automatically. The engine and the
ignition must therefore be switched off (the
SmartKey must be in position 0 or 1 in the
ignition lock or the Start/Stop button must be
in position 0 or 1) if the electric parking brake
is tested on a brake dynamometer.
Braking triggered automatically by ESP
®
may
cause severe damage to the brake system.
!
Vehicles without 4MATIC: the ESP
®
sys-
tem operates automatically. The engine and
the ignition must therefore be switched off
(the SmartKey must be in position 0 or 1 in the
ignition lock or the Start/Stop button must be
in position 0 or 1) if:
R
the electric parking brake is tested using a
brake dynamometer.
R
the vehicle is towed with one axle raised.
Braking triggered automatically by ESP
®
may
cause severe damage to the brake system.
All checks and maintenance work on the brake
system must be carried out at a qualified spe-
cialist workshop.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the functional-
ity of your brakes at regular intervals.
Information on BAS (Brake Assist) (
Y
page 69)
and BAS PLUS (Brake Assist PLUS) (
Y
page 69).
For safety reasons, Mercedes-Benz recom-
mends only installing the following brake disks
and brake pads/linings:
R
brake disks that have been approved by
Mercedes-Benz
R
brake pads/linings that have been approved
by Mercedes-Benz or that are of an equivalent
standard of quality
Other brake disks or brake pads/linings can
compromise the safety of your vehicle.
Always replace all brake disks and brake pads/
linings on an axle at the same time. Always
install new brake pads/linings when replacing
brake disks.
The vehicle is equipped with lightweight brake
disks to which the wheel assembly with rim and
threaded connection is matched.
The use of brake disks other than those
approved by Mercedes-Benz can change the
track width and is subject to approval, if appli-
cable.
Shock-type loads when handling the brake
discs, such as when changing wheels, can lead
to a reduction in comfort when driving with light-
weight brake discs. Avoid shock-type loads on
the lightweight brake disks, particularly on the
brake plate.
Mercedes-Benz recommends that you only use
brake fluid that has been specially approved for
your vehicle by Mercedes-Benz, or which corre-
Driving tips
195
Dr
iv
ing
and
pa
rk
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