brake MERCEDES-BENZ GLC 2018 Service Manual

R
avoid sudden steering movements R
brake carefully
Driving on flooded roads
! Bear in mind that vehicles traveling in front
or in the opposite direction create waves. This
may cause the maximum permissible water
depth to be exceeded.
Failure to observe these notes may result in
damage to the engine, electrical systems and
transmission.
If you have to drive on stretches of road on which
water has collected, please bear in mind that: R
in the case of standing water, the water level
may be no higher than the lower edge of the
vehicle body R
you should drive no faster than walking pace
Winter driving
G WARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
G DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the
vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open a
window on the side of the vehicle that is not
facing into the wind.
Have your vehicle winter-proofed at a qualified
specialist workshop at the onset of winter.
Drive particularly carefully on slippery road sur-
faces. Avoid sudden acceleration, steering and braking maneuvers. Do not use cruise control or
Distance Pilot DISTRONIC.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed: X
Shift the transmission to position \\ .
The outside temperature indicator is not
designed to serve as an ice-warning device and
is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freezing
point do not guarantee that the road surface is
free of ice. The road may still be icy, especially in
wooded areas or on bridges. The vehicle could
skid if you fail to adapt your driving style. Always
adapt your driving st yle an d drive at a speed to
suit the prevailing weather conditions.
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
For more information on driving with snow
chains, see ( Y
page 351).
For more information on driving with summer
tires, see ( Y
page 351).
Observe the notes in the "Winter operation" sec-
tion ( Y
page 351).
Off-road driving
Important safety notes
G WARNING
If you drive on a steep incline at an angle or
turn when driving on an incline, the vehicle
could slip sideways, tip and rollover. There is a
risk of an accident.
Always drive on a steep incline in the line of
fall (straight up or down) and do not turn the
vehicle.
G WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system. There is a risk
of fire.
When driving on an unpaved road or off-road,
check the vehicle underside regularly. In par-
ticular, remove trapped plant parts or other Driving tips 165
Driving and parking Z

flammable material. Contact a qualified spe-
cialist workshop immediately if damage is
detected.
! There is a risk of damage to the vehicle if: R
the vehicle becomes stuck, e.g. on a high
curb or an unpaved road R
you drive too fast over an obstacle, e.g. a
curb, a speed bump or a pothole in the road R
a heavy object strikes the underbody or
parts of the chassis
In situations like this, the body, the under-
body, chassis parts, wheels or tires could be
damaged without the damage being visible.
Components damaged in this way can unex-
pectedly fail or, in the case of an accident, no
longer withstand the loads they are designed
to.
If the underbody paneling is damaged, com-
bustible materials such as leaves, grass or
twigs can gather between the underbody and
the underbody paneling. If these materials
come in contact with hot parts of the exhaust
system, they can catch fire.
In such situations, have the vehicle checked
and repaired immediately at a qualified spe-
cialist workshop. If on continuing your jour-
ney you notice that driving safety is impaired,
pull over and stop the vehicle immediately,
paying attention to road and traffic condi-
tions. In such cases, consult a qualified spe-
cialist workshop.
The vehicle is only designed for easily negotiable
off-road terrain and poor road surfaces.
When driving off-road, substances such as sand,
mud and water or water mixed with oil may get
into the brakes. This could result in a reduced
braking effect or in total brake failure and also in
increased wear and tear. The braking charac-
teristics change depending on the material
entering the brakes. Clean the brakes after driv-
ing off-road. If you detect a reduced braking
effect or gri nding
noises, have the brake system
checked in a qualified specialist workshop as
soon as possible. Adapt your driving style to the
different braking characteristics.
Driving off-road increases the likelihood of dam-
age to the vehicle, which, in turn, can lead to
failure of the mechanical assembly or systems.
Adapt your driving style to suit the terrain con-
ditions. Drive carefully. Have damage to the vehicle rectified immediately at a qualified spe-
cialist workshop.
Do not shift into transmission position \\ when
driving off-road. You could lose control of the
vehicle if you attempt to brake the vehicle using
the service brake. If the gradient is too steep for
your vehicle, drive back down in reverse gear.
General notes
H Environmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
Read this section carefully before driving your
vehicle off-road.
Off-road driving is only possible with the Off-
Road Engineering package ( Y
page 181).
The following driving systems are specially
adapted for driving over easily negotiable off-
road terrain: R
Off-road program ( Y
page 181)R
Off-road 4ETS ( Y
page 70)R
Off-road ESP ®
( Y
page 72)R
DSR (Downhill Speed Regulation)
( Y
page 180)
Observe the following notes: R
Stop the vehicle before starting to drive along
an off-road route. If necessary, activate the
off-road program ( Y
page 181).R
To avoid damaging the vehicle, make sure
there is always sufficient ground clearance. R
Check that items of luggage and loads are
stowed safely and are well secured
( Y
page 295). R
Always keep the engine running and in gear
when driving on a downhill gradient. Activate
DSR ( Y
page 180). R
Drive slowly and evenly, if necessary at a
walking pace. R
Ensure that the wheels are in contact with the
ground at all times. R
Drive with extreme care on unfamiliar off-road
routes where visibility is poor. For safety rea-
sons, get out of the vehicle first and survey
the off-road route. R
Check the depth of water before fording rivers
and streams. R
Watch out for obstacles.166
Driving tips
Driving and parking

R
Take care when turning on an uphill or down-
hill slope or when driving across a slope. The
vehicle could otherwise tip over. R
Always keep the side windows and the pano-
rama roof with power tilt/sliding panel closed
during the journey. R
Do not deviate from marked routes.
Do not use the HOLD function when driving off-
road, on steep uphill or downhill gradients or on
slippery or loose surfaces. The HOLD function
cannot hold the vehicle on such surfaces.
Checklist before driving off-road X
Engine oil level: check the engine oil level
and add oil if necessary.
When driving on steep gradients, the engine
oil level must be sufficiently high to ensure a
correct oil supply in the vehicle. X
Wheels and tires: check the tire tread depth
and tire pressure. X
Check for damage and remove any foreign
objects, e.g. small stones, from the wheels/
tires. X
Replace any missing valve caps. X
Replace dented or damaged wheels. X
Rims: dented or bent rims can result in a loss
of tire pressure and damage the tire bead.
Before driving off-road, check the wheels and
replace them if necessary.
Checklist after driving off-road
! If you detect damage to the vehicle after
driving off-road, have the vehicle checked
immediately at a qualified specialist work-
shop. X
Deactivate off-road program ( Y
page 181).X
Deactivate DSR ( Y
page 180).X
Clean the headlamps and rear lights and
check for damage. X
Clean the front and rear license plates. X
Clean the wheels/tires with a water jet and
remove any foreign objects. X
Clean the wheels, wheel housings and the
vehicle underside with a water jet; check for
any foreign objects and damage. X
Check whether twigs or other parts of plants
have become trapped. These increase the risk
of fire and can damage fuel pipes, brake hoses or the rubber bellows of the axle joints
and propeller shafts. X
After the trip, examine without fail the entire
undercarriage, wheels, tires, brakes, body-
work structure, steering, chassis and exhaust
system for damage. X
After driving in sand, mud, gravel, water or
similar dirty conditions, have the following
checked and cleaned: R
brake discs R
wheels R
brake pads R
axle joints X
If you detect strong vibrations after off-road
travel, check for foreign objects in the wheels
and drive train and remove them if necessary.
Foreign objects can disturb the balance and
cause vibrations.
Driving over poor road surfaces places greater
demands on your vehicle than driving on normal
roads. After driving off-road, check the vehicle.
This allows you to detect damage promptly and
reduce the risk of an accident to yourself and
other road users.
Driving on sand Observe the following rules when driving on
sand: R
Select the off-road program ( Y
page 181).R
Avoid high engine speeds. R
Use the left-hand steering wheel paddle
shifter to shift to a lower gear appropriate to
the terrain. R
Drive quickly to overcome the rolling resist-
ance. Otherwise the vehicle's wheels could
become stuck in loose ground. R
Drive in the tracks of other vehicles if possi-
ble. Make sure that: -
the tire ruts are not too deep. -
the sand is sufficiently firm. -
the ground clearance of the vehicle is suf-
ficient.
Tire ruts and gravel roads
! Check that the ruts are not too deep and
that your vehicle has sufficient clearance.
Otherwise, your vehicle could be damaged or
bottom out and get stuck. Driving tips 167
Driving and parking Z

Observe the following rules when driving along
ruts in off-road terrain or on roads with loose
gravel: R
Activate the off-road program ( Y
page 181).R
Avoid high engine speeds. R
Shift to a lower gear using the left-hand steer-
ing wheel paddle shifter. R
Drive slowly. R
Where ruts are too deep, drive with the
wheels of one side on the center grassy area,
if possible.
Traveling uphill
Approach/departure angle
G WARNING
If you drive on a steep incline at an angle or
turn when driving on an incline, the vehicle
could slip sideways, tip and rollover. There is a
risk of an accident.
Always drive on a steep incline in the line of
fall (straight up or down) and do not turn the
vehicle. R
Observe the warnings for off-road driving
( Y
page 165).R
Follow the line of fall when driving on slopes
and steep inclines. R
Before driving on extreme uphill and downhill
gradients, select the off-road program
( Y
page 181).R
Drive slowly. R
Accelerate gently and make sure that the
wheels are gripping. R
Avoid high engine speeds, except when driv-
ing on sandy and muddy routes with high driv-
ing resistance. R
Use the left-hand steering wheel paddle
shifter to shift to a lower gear appropriate to
the gradient. R
Use the left-hand steering wheel paddle
shifter to shift into a lower gear in good time
on long and steep downhill gradients.
Hill start assist will aid you when pulling away on
a hill. For further information about hill start
assist, see ( Y
page 140).
Do not shift into transmission position \\ when
driving off-road. You could lose control of the vehicle if you attempt to brake the vehicle using
the service brake. If the gradient is too steep for
your vehicle, drive back down in reverse gear.
Always observe the approach/departure angle
values ( Y
page 384).
Maximum gradient-climbing capability Always observe the maximum gradient climbing
ability values ( Y
page 384).
Hilltops When driving up an uphill gradient, slightly
reduce pressure on the accelerator immediately
before reaching the brow of the hill. Make use of
the vehicle's own impetus to travel over the
brow.
This style of driving prevents: R
the vehicle from lifting off the ground on the
brow of a hill R
the vehicle from traveling too quickly down
the other side
Driving downhill R
Drive slowly. R
Do not drive at an angle down steep inclines.
Steer into the line of fall and drive with the
front wheels aligned straight. Otherwise, the
vehicle could slip sideways, tip and rollover. R
Shift to a lower gear using the left-hand steer-
ing wheel paddle shifter before tackling steep
downhill gradients. R
Activate DSR. If this is not sufficient, brake
gently. When doing so, make sure that the
vehicle is facing in the direction of the line of
fall. R
Check that the brakes are working normally
after a long downhill stretch.
Off-road ABS is activated when the off-road pro-
gram is selected.
At speeds below 18 mph (30 km/h), the front
wheels lock cyclically during braking. The dig-
ging-in effect achieved in the process reduces
the stopping distance on off-road terrain. The
steerability of the vehicle is considerably
reduced if the wheels lock.168
Driving tips
Driving and parking

Drivin g systems
Mercedes-Benz Intelligent Drive Mercedes-Ben z Intelligen t Drive stand s fo r inno -
vative driver assistanc e and safet y systems
whic h enhance comfor t and suppor t th e driver in
critical situations. Wit h these intelligen t coordi-
nated systems Mercedes-Ben z has set a mile-
ston e on th e pat h toward s autonomous driving.
Mercedes-Ben z Intelligen t Drive embraces all
elements of active and passive safet y in on e well
though t out syste m – fo r th e safet y of th e vehi-
cl e occupant s and that of other road users.
Further information on drivin g safet y systems
( Y
page 66).
Cruis e contro l
General notes Cruise contro l maintain s a constant road speed
fo r you. It brake s automatically in order to avoid
exceedin g th e set speed. Change into a lowe r
gear in goo d time on lon g and steep downhill
gradients. Thi s is especially important if th e
vehicle is lade n or towin g a trailer . By doin g so,
you will mak e use of th e braking effect of th e
engine. Thi s relieves th e load on th e brake sys -
te m and prevents th e brake s from overheatin g
and wearin g to o quickly.
Use cruise contro l only if road and traffic con-
dition s mak e it appropriat e to maintain a steady
speed fo r a prolonged period. You can stor e any
road speed abov e 20 mph (30 km/h).
Important safet y notesCruise contro l can neither reduce th e ris k of an
acciden t if you fai l to adapt your drivin g style no r
override th e laws of physics. Cruise contro l can -
no t take into accoun t th e road, traffic and
weather conditions. Cruise contro l is only an
aid. You are responsible fo r maintainin g a saf e
distanc e to th e vehicle in front, fo r vehicle
speed, fo r braking in goo d time and fo r stayin g in
lane. Do no t use cruise control: R
in road and traffic condition s whic h do no t
allow you to maintain a constant speed, e.g. in
heav y traffic or on windin g roadsR
on slipper y road surfaces. Brakin g or accel-
erating could cause th e drive wheels to los e
traction and th e vehicle could then skid R
when there is poo r visibility, e.g. due to fog,
heav y rain or snow
If there is a chang e of drivers, advise th e ne w
driver of th e speed stored.
i The speed indicated in th e speedometer
may diffe r slightly from th e speed stored.
Cruis e contro l lever
C
Activates or increase s speedD
Activates or reduce s speed

X
Accelerate the vehicle to the desired speed. X
Briefly press the cruise control lever up C or
down D .X
Remove your foot from the accelerator pedal.
Cruise control is activated. The vehicle auto-
matically maintains the stored speed.
i Cruise control may be unable to maintain
the stored speed on uphill gradients. The
stored speed is resumed when the gradient
evens out. Cruise control maintains the
stored speed on downhill gradients by auto-
matically applying the brakes.
Storing the current speed or calling up
the last stored speed
G WARNING
If you call up the stored speed and it is lower
than the current speed, the vehicle deceler-
ates. If you do not know the stored speed, the
vehicle could decelerate unexpectedly. There
is a risk of an accident.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you
do not know the stored speed, store the
desired speed again. X
Briefly pull the cruise control lever towards
you

Change into a lower gear in good time on long
and steep downhill gradients. This is especially
impo rtant if the veh icle is laden. By doin g so, you
will make use of the braking effect of the engine.
This relieves the load on the brake system and
prevents the brakes from overheating and wear-
ing too quic kly.
If Distance Pilot DI ST RONIC detects that there is
a risk of a co llisio n, you will be warned visually
and acoustically. Without your intervention, Dis-
tance Pilot DISTRONIC cannot prevent a co lli-
sion. An intermittent warning tone will then
sound and the dist ance warning lamp will light
up in the instrument cluster. Brake immediately
in order to increase the dist ance to the veh icle in
front or take evasive action pro vide d it is safe to
do so.
Distance Pilot DI ST RONIC operates in the range
between 0 mph (0 km/h) and 120 mph
(200 km/h).
Do not use Distance Pilot DI ST RONIC while driv -
ing on roads with steep gradients.
Sin ce Distance Pilot DI ST RONIC transmits radar
waves, it can resemble the radar detectors of
the respon sible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked about this.
i USA only: This device has been approved by
the FCC as a "Vehicular Radar System". The
radar sensor is intended for use in an aut o-
m
otive radar system only. Removal, tamper-
ing, or altering of the device will void any war-
ranties, and is not permitted by the FCC. Do
not tamper wit h, alter, or use in any non-
approved way.
Any unauthorized mod ific ation to th is device
could void the user's authority to operate the
equipm ent.
i Canada only: This device co mplie s wit h
RSS -210 of In dustry Canada. Operation is
subject to the foll owin g two conditions:
1. This device may not cause interference,
and
2. This device must accept any interference
receive d, inc ludin g interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the device
will void any warranties, and is not permitte d.
Do not tamper wit h, alter, or use in any non-
approved way. Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
Important safety notes
G WARNING
Distance Pilot DI ST RONIC does not react to: R
people or animals R
stationary objects on the road, e.g. st oppe d
or parked vehicles R
oncoming vehicles and crossing traffic
As a result, Distance Pilot DI ST RONIC may
neither give warnings nor intervene in such
situations. There is a risk of an accident.
Alwa ys pay careful attention to the traff ic sit-
uation and be ready to brake.
G WARNING
Distance Pilot DI ST RONIC cannot always
clearly identify other road users and co mple x
traff ic situations.
In such cases, Distance Pilot DI ST RONIC may:R
give an unnecessary warning and then
brake the vehicle R
neither give a warning nor intervene R
accelerate or brake unexpect edly
There is a risk of an accident.
Continue to drive carefully and be ready to
brake, especially if Distance Pilot DISTRONIC
warns you.
G WARNING
Distance Pilot DI ST RONIC brakes your vehicle
with up to 50% of the maximum poss ible
deceleration. If this deceleration is not suffi-
cient, Distance Pilot DI ST RONIC alerts you
wit h a visual and acoustic warning. There is a
risk of an accident.
Apply the brakes yourself in these situations
and try to take evasive action.
! When Distance Pilot DI ST RONIC or the
HOLD function are activated, the vehicle
brakes automatically in certain situations.Driving systems 171
Driving and parking Z

When you change lanes, Distance Pilot
DISTRONIC monitors the left lane (on left-hand-
drive vehicles) or the right lane (on right-hand-
drive vehicles).
Stopping
G WARNING
If you leave the vehicle when it is only being
braked by Distance Pilot DISTRONIC, it could
roll away if: R
there is a malfunction in the system or in
the voltage supply. R
Distance Pilot DISTRONIC is switched off
using the cruise control lever, e.g. by a vehi-
cle occupant or from outside the vehicle R
the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with. R
the battery is disconnected R
the vehicle is accelerated, e.g. by a vehicle
occupant.
There is a risk of an accident.
Before leaving the vehicle, always deactivate
Distance Pilot DISTRONIC and secure the
vehicle against rolling away.
Further information on deactivating Distance
Pilot DISTRONIC ( Y
page 176).
If Distance Pilot DISTRONIC detects that the
vehicle in front is stopping, it brakes your vehicle
to a stop.
Once your vehicle is stationary, it remains sta-
tionary and you do not need to depress the
brake.
After a time, the electric parking brake secures
the vehicle and relieves the service brake.
Depending on the specified minimum distance,
your vehicle will come to a standstill at a suffi-
cient distance behind the vehicle in front. The
specified minimum distance is set using the
control on the cruise control lever. When Distance Pilot DISTRONIC is activated,
the transmission shifts automatically to position
] if: R
the driver's seat belt is not fastened and the
driver's door is open. R
the engine is switched off, unless it is auto-
matically switched off by the ECO start/stop
function.
The electric parking brake secures the vehicle
automatically if Distance Pilot DISTRONIC is
activated when the vehicle is stationary and: R
a system malfunction occurs. R
the power supply is insufficient.
If a malfunction occurs, the transmission may
also be shifted to position ] automatically.
Setting a speed X
Push cruise control lever up C for a higher
speed or down D for a lower speed.X
To adjust the set speed in 1 mph incre-
ments (1 km/h increments): briefly push
the cruise control lever up C or down D to
the pressure point.
Every time the cruise control lever is pressed
up C or down D the last speed stored is
increased or reduced. X
To adjust the set speed in 5 mph incre-
ments (10 km/h increments): briefly push
the cruise control lever up C or down D
beyond the pressure point.
Every time the cruise control lever is pressed
up C or down D , the last speed stored is
increased or reduced.
i If you accelerate to overtake, Distance Pilot
DISTRONIC adjusts the vehicle's speed to the
last speed stored after you have finished over-
taking.
Setting a specified minimum distance You can set the specified minimum distance for
Distance Pilot DISTRONIC by varying the time
span between one and two seconds. With this
function you can set the minimum distance that
Distance Pilot DISTRONIC maintains to the vehi-
cle in front, depending on vehicle speed. You
can see this distance in the multifunction dis-
play ( Y
page 175).
Make sure that you maintain the minimum dis-
tance to the vehicle in front as required by law.174
Driving systems
Driving and parking

Deactivating Distance Pilo t DISTRONI C
There are severa l ways to deactivat e Distanc e
Pilo t DISTRONIC: X
Briefly push cruise contro l lever forwar d C .
or X
Brake, unless th e vehicle is stationary
Whe n you deactivat e Distanc e Pilo t DISTRONIC,
th e Distance Pilot Off messag e will appear
on th e multifunction display fo r approximately
fiv e seconds.
The last speed stored remain s stored until you
switch of f th e engine.
Distanc e Pilo t DISTRONIC is no t deactivated if
you depress th e accelerator pedal.
Distanc e Pilo t DISTRONIC is automatically deac -
tivated if: R
you engage th e electric parking brake or if th e
vehicle is automatically secure d wit h th e elec -
tric parking brake R
ES P ®
intervenes or you deactivat e ES P ®
R
you shift th e transmissio n to position ] , ^
or \\ R
you pull th e cruise contro l lever toward s you
in order to pull away and th e front-passenger
doo r or on e of th e rea r doors is ope nR
th e vehicle slip sR
you activat e Parking Pilo t
If , in these cases, Distanc e Pilo t DISTRONIC is
deactivated, a warnin g tone sounds. The Dis ‐
tance Pilot Off messag e will then be shown
on th e multifunction display fo r approximately
fiv e seconds.
Vehicles wit h th e Off-Road Engineering
package: if you switch on DS R or th e Gradient
off-road program, Distanc e Pilo t DISTRONIC
automatically switches of f without advanc e
warning. In this cas e th e assistanc e display
shows th e DS R symbol

Steering Pilot cannot provide assistance: R
on very sharp corners R
when towing a trailer R
when a loss of tire pressure or a defective tire
has been detected and displayed
Pay attention also to the important safety notes
on Distance Pilot DISTRONIC ( Y
page 171).
The steering interventions are carried out with a
limited steering moment. The system requires
the driver to keep his hands on the steering
wheel and to steer himself.
If you do not steer yourself or if you take your
hands off the steering wheel for a prolonged
period of time, the system will first alert you with
a visual warning. A steering wheel symbol
appears in the multifunction display. If you have
still not started to steer and have not taken hold
of the steering wheel, a warning tone also
sounds to remind you to take control of the
vehicle after five seconds at the latest. Steering
Pilot is then switched to passive. Distance Pilot
DISTRONIC remains active.
Activating Steering Pilot
X
Press button D .
Indicator lamp C lights up. The Steering
Pilot On message appears on the multifunc-
tion display. Steering Pilot is activated. Information in the multifunction display
If Steering Pilot is activated but not ready for a
steering intervention, steering wheel symbol C
appears in gray. If the system provides you with
support by means of steering interventions,
symbol C is shown in green.
Deactivating Steering Pilot X
Press button D .
Indicator lamp C goes out. The Steering
Pilot Off message appears on the multi-
function display. Steering pilot is deactivated.
When Distance Pilot DISTRONIC is deactivated
or not available, Steering Pilot is deactivated
automatically.
HOLD function
General notes The HOLD function can assist the driver in the
following situations: R
when pulling away, especially on steep slopes R
when maneuvering on steep slopes R
when waiting in traffic
The vehicle is kept stationary without the driver
having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.178
Driving systems
Driving and parking