Maintenance - Mercedes-Benz S-Class Coupe Operator's Manual

on for a short while. This allows the airflow to
cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rain
without braking, there may be a delayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehicle
washed, brake firmly while paying attention to
the traffic conditions. This will warm up the
brake discs, thereby drying them more quickly
and protecting them against corrosion.
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.
In order to prevent any salt build-up, apply the
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brakes occasionally while paying attention to
the traffic conditions.
Carefully depress the brake pedal and the
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beginning and end of a journey.
Maintain a greater distance to the vehicle
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ahead.
Servicing the brakes
!
The brake fluid level may be too low, if:
if the red brake warning lamp lights up in
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the instrument cluster and
you hear a warning tone while the engine is
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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
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
cause severe damage to the brake system.
!
Vehicles without 4MATIC: the ESP
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:
the electric parking brake is tested using a
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brake dynamometer.
the vehicle is towed with one axle raised.
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Braking triggered automatically by ESP
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) (
and BAS PLUS (Brake Assist PLUS) (
For safety reasons, Mercedes-Benz recom-
mends only installing the following brake disks
and brake pads/linings:
brake disks that have been approved by
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Mercedes-Benz
brake pads/linings that have been approved
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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.
Driving tips
143
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system
®
may
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sys-
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may
page 62)
Y
page 62).
Y
Z