brakes MERCEDES-BENZ SPRINTER 2018 MY18 Operator’s Manual

longed rolling of the wheels, e.g. when being
towed, will result in transmission damage.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
XShift the transmission to neutral position N.
XTry to maintain control of the vehicle using
corrective steering.
Drive particularly carefully on slippery roads.
Avoid sudden acceleration, steering and braking
maneuvers. Do not use cruise control.
You can find further information on winter tires
and snow chains in the "Winter operation" sec-
tion (
Ypage 250).
Driving off-road
Important safety notes
GWARNING
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.
GWARNING
When driving off-road, your body is subject to
forces from all directions, due to the uneven
surface. You could be thrown from your seat,
for instance. There is a risk of injury.
Always wear a seat belt, even when driving off-
road.
GWARNING
If you drive over obstacles or in ruts, the steer-
ing wheel may jerk out of your grip, causing
injury to your hands.
Always hold the steering wheel firmly with
both hands. When driving over obstacles, you
must expect steering forces to increase
briefly and suddenly.
GWARNING
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 off road or on unpaved roads,
check the vehicle's underside regularly. In
particular, remove parts of plants or other
flammable materials which have become
trapped. In the case of damage, contact a
qualified specialist workshop.
!When driving off-road or on unpaved surfa-
ces, check the underside of the vehicle and
the wheels and tires at regular intervals. In
particular, remove any trapped foreign
objects, e.g. stones and branches.
Such foreign objects may:
Rdamage the chassis, the fuel tank or the
brake system
Rcause imbalances and thus vibrations
Rbe flung out when you continue driving
If there is any damage, inform a qualified spe-
cialist workshop.
When driving off-road and on construction sites,
sand, mud and water mixed with oil, for exam-
ple, may get into the brakes. This may lead to a
reduction in braking performance or total brake
failure, also as a result of increased wear. The
braking characteristics will vary depending on
the material that has got into the system. Clean
the brakes after driving off-road. If you then
notice reduced braking performance or hear
scraping noises, have the brake system checked
at a qualified specialist workshop. Adjust your
driving style to the changed braking character-
istics.
Driving off-road or on construction sites increa-
ses the possibility of vehicle damage which may
in turn lead to the failure of certain assemblies
and systems. Adapt your driving style to the off- road driving c
onditions. Drive carefully. Have
any vehicle damage rectified at a qualified spe-
cialist workshop as soon as possible.
When driving on rough terrain, do not shift the
transmission into the neutral position. You could
lose control when attempting to brake the vehi-
cle with the service brake. If your vehicle cannot
manage an uphill slope, drive back down the
slope in reverse gear.
Driving tips137
Driving and parking
Z

XCheck the wheels and tires and wheel archesfor trapped foreign objects and remove them.
Trapped foreign objects can damage the
wheels and tires or may beflung out from the
veh icle when you continue driving.
XCheck the underbo dyfor trapped branches or
other parts of plants and remove them.
XClean the brake disks, brake padsand axle
jo ints, particular lyafter operation insand,
mud, grit and gravel, water or similarly dirt y
conditions.
XCheck the entire floor assembly, the tires,
wheels, bodywork structure, brakes, steering,
chassis and exhaust system for any damage.
XCheck the service brake for operating safety,
e.g. carry out a brake test.
XIf you notice strong vibrations after driving off-
road, check the wheels and drive train for for-
eign objects again. Remove any foreign
objects which can lead to imbalances and
thus cause vibrations.
Driving systems
Cruise control
General notes
Cruise control maintains the speed of the veh i-
cle for you.
Use cruise control ifroad and traff icconditions
make itappropriate to maintain a steady speed
for a prolonged period. You can set any speed
from 20 mph upwards inincrements of 1 mph.
iIfyou have set km /has the unit for the dig-
ital speedometer (Ypage 168), you can set
any speed from 30 km /hupwards inincre-
ments of 1 km/h.
Cruise control should not beactivated when
driv ing off-road or on construction sites.
Cruise control may not be ableto maintain the
stored speed on uphillordownhill gradients. If
the gradient evens out and the veh icle's speed
does not fall below 20 mph (30 km/h), the
stored speed is resumed.
iThe speed shown in the speedometer may
differ slightly from the speed stored by cruise
control.
Important safety notes
If you fail to adapt your driving style or if you are
inattentive, cruise control can neither reduce
the risk of an accident nor override the laws of
physics. Cruise control cannot take road,
weather and traffic conditions into account.
Cruise control is only an aid. You are responsible
for the distance to the vehicle in front, for vehi-
cle speed, for braking in good time and for stay-
ing in lane.
Do not use cruise control:
Rin traffic conditions that are unsuitable for
driving at a constant speed, e.g. in heavy traf-
fic, on winding roads or off-road
Ron slippery roads. Braking or accelerating can
cause the drive wheels to lose traction and
the vehicle could then skid
Rwhen visibility is poor, e.g. due to fog, heavy
rain or snow
If there is a change of drivers, make sure that
you inform the new driver about the set cruise
speed.
Cruise control lever
Operating cruise control
:To activate and store the current speed or a
higher speed
;To activate at the last stored speed
=To activate and store the current speed or a
lower speed
?To deactivate cruise control
The cruise control lever is the upper lever on the
left of the steering column.
Displaying the cruise control speed
Vehicles with steering wheel buttons: when
you activate cruise control, the text field in the
display briefly shows the Cr.
controlmessage
Driving systems139
Driving and parking
Z

and the stored speed. The status area of the
display then shows theVsymbol and the
stored speed.
Vehicles without steering wheel buttons:
when you activate cruise control, the display
briefly shows the Vsymbol and the stored
speed.
Activation conditions
To activate cruise control, all of the following
activation conditions must be fulfilled:
Rthe parking brake must be released. The c
indicator lamp in the instrument cluster is off
Ryou are driving faster than 20 mph (30 km/h)
Rneither the brake or clutch pedal is depressed
iOther drive and brake systems not descri-
bed in this Operator's Manual, such as a
retarder, may affect cruise control. You can
find information on this in the separate oper-
ating instructions provided by the body man-
ufacturer.
Storing and maintaining the current
speed
XAccelerate the vehicle to the desired speed
above 20 mph (30 km/h).
XBriefly push the cruise control lever up :or
down ?.
XRelease the accelerator pedal.
Cruise control is activated. The current speed
is stored.
The display shows the Vsymbol and the
stored speed.
Resuming the stored speed
GWARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an acci-
dent.
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.
XBriefly pull the cruise control lever towards
you =.
XRelease the accelerator pedal.
Cruise control is activated and resumes the
vehicle's speed to the last speed stored.
The display shows the Vsymbol and the
stored speed.
iWhen you pull the cruise control lever
towards you for the first time after starting the
engine, cruise control adopts the current
speed.
Setting the speed
It may be a moment before the vehicle starts to
accelerate or brake to the set speed. Take this
delay into account when setting the speed.
XBriefly push the cruise control lever up :to
increase the speed or down =to reduce the
speed.
The last stored speed increases or decreases
in 1 mph increments (1 km/h increments).
or
XPress and hold the cruise control lever up :
or down =until the desired speed has been
reached.
XRelease the cruise control lever.
The current speed is stored.
The display shows the Vsymbol and the
stored speed.
iCruise control is not deactivated if you
depress the accelerator pedal. If you acceler-
ate briefly to overtake, for example, cruise
control resumes the vehicle’s speed to the
last speed stored after you have finished over-
taking.
Deactivating cruise control
There are various ways to deactivate cruise con- trol:
XBriefly press the cruise control lever for-
wards ?.
or
XApply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off the
engine.
140Driving systems
Driving and parking

Cruise controlisdeactivated automatically
when:
Ryou apply the brakes
Ryouapply the parking brake and the c
indicator lamp inthe instrument cluster lights
up
Ryou are driving slower than 20 mph (30 km/h)
Ryou shift the automat ictransmission to neu-
tral position Nwhile the vehicle is inmotion
RESP®or ASR intervenes
Rthere isa malfunction inthe ESP®, ASR or ABS
system
Problems with cruise control
ProblemPossible causes/consequences and MSolutions
On vehicleswit h steering
wheel buttons, the
speed cannot beset
when cruise control is
activated.The displ ay shows a high-priority message. Thus a change in speed is
not possible.
XProceed as instructed by the message inthe display.
XDeactivate cruise control
COLLISION PREVENTION ASSIST
General notes
COLL ISION PREVENTION AS SISTcomprises the
dist ance warning function and adaptive Brake
Assist.
Distance warning function
Important safety notes
iNote the section on 'Important safety notes'
(Ypage 54).
GWAR NING
The distance warning function does not react:
Rto people or animals
Rto oncoming veh icles
Rto crossing traff ic
Rwhen cornering
The distance warning function may not give
warnings inall critical situations. There isa
risk of an acc ident.
Alwa ys pay careful attention to the traff icsit-
uation and beready to brake.
Alwa ys adapt your speed to suit the pre vailing
road and traff icconditions.
GWARNING
The distance warning function cannot always
clearly identify objects and co mplex traffic
situations.
In such cases, the distance warning function
may:
Rgive an unnecessary warning
Rnot give a warning
There isa risk of an accident.
Always pay careful attention to the traffic sit-
uation and donot rely solely on the distance
warning function.
Operation
The distance warning function can help you to
minimize the risk of a front-end collision with a
vehicle ahead or reduce the effects of such a
collision. If the distance warning function
detects that there is a risk of a collision, you will
be warned visually and acoustically. Without
your intervention, the distance warning function
cannot prevent a collision.
The distance warning function willissue a warn-
ing at speeds of around 20 mph (30 km/h)or
more if:
Ryou approach a vehicle ahead of you very
quickly. You will then hear an intermittent
warning tone and the red ·warning lamp
in the instrument cluster flashes.
Driving systems141
Driving and parking
Z

Always pay careful attention to the traffic sit-uation and be ready to brake.
Adaptive Brake Assist aids you when braking
during hazardous situations at speeds above
20 mph (30 km/h). With the help of Adaptive
Brake Assist, the distance warning signal can
detect obstacles that are in the path of your
vehicle for an extended period of time.
When you approach an obstacle and adaptive
Brake Assist detects that there is a risk of a col- lision, adaptive Brake Assist calculates the brak-
ing force necessary to avoid a collision. Should
you apply the brakes forcefully, adaptive Brake
Assist will automatically increase the braking
force to the calculated level.
XKeep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes function as usual again if:
Ryou release the brake pedal
Rthere is no longer any danger of a collision
Rno obstacle is detected in front of your vehicle
Adaptive Brake Assist is then deactivated.
Up to the maximum vehicle speed, adaptive
Brake Assist can react to moving obstacles that
have already been recognized as such at least
once over the period of observa tion. Ad
aptive
Brake Assist does not react to stationary obsta-
cles.
In particular, the detection of obstacles can be
impaired if:
Rdirt, ice or anything else covering the sensors
Rsnow or heavy rain
Rinterference from other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
If adaptive Brake Assist is not available due to a
malfunction in the radar sensor system, the full
brake boosting effect with the help of BAS
remains available.
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Lane Tracking package
Blind Spot Assist
General notes
Blind Spot Assist monitors the areas on either
side of the vehicle that are not visible to the
driver with two lateral, rear-facing radar sensors
in the bumper. It supports you from speeds of
approximately 20 mph (30 km/h). A warning
display in the exterior mirrors draws your atten-
tion to vehicles detected in the monitored area. If you then switch on the corresponding turn
signal to change lane, you will also receive an
optical and audible collision warning.
Important safety notes
GWARNING
Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing them in the blind spot area
Rvehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving. Always ensure that there is
sufficient distance to the side for other road
users and obstacles.
iUSA only:
This device has been approved by the FCC as
a "Vehicular Radar System". The radar sensor
is intended for use in an automotive radar
system only. Removal, tampering, or altering
of the device will void any warranties, and is
not permitted by the FCC. Do not tamper with, alter, or use in any non-approved way.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
Driving systems143
Driving an d parking
Z

Conditions for engaging/disengaging
LOW RANGE can only be engaged or disengaged
if:
Rthe engine is running
Rthe vehicle is stationary
Rthe brake pedal is depressed
Rthe selector lever of the automatic transmis-
sion is in positionPor N
Rall-wheel drive is engaged
Engaging and disengaging LOW RANGE
:Engages and disengages LOW RANGE
XTo engage or disengage: press button:
or ;.
The + indicator lamp flashes in the instru-
ment cluster for the duration of the engaging/
disengaging process.
If the engaging/disengaging process is suc-
cessful:
Rand LOW RANGE is engaged, the +indi-
cator lamp lights up.
Rand LOW RANGE is disengaged, the +
indicator lamp goes out.
As long as the +indicator lamp is flashing,
you can cancel the engaging/disengaging
process by pressing button :or; again.
If the engaging/disengaging process fails, the + indicator lamp briefly flashes three
times. One of the gear change conditions was
not fulfilled.
DSR (Downhill Speed Regulation)
Important safety notes
Observe the notes on braking in the section on
"Driving and parking". If you fail to adapt your
driving style or you are inattentive, DSR can nei-
ther reduce the risk of accident nor override the laws of physics. DSR cannot take road, weather
and traffic conditions into account. DSR is only
an aid. You are responsible for the distance to
the vehicle in front, for vehicle speed and for
braking in good time.
General notes
DSR supports you with the LOW RANGE trans-
mission ratio when you are driving downhill off-
road and on construction sites. DSR maintains a
preset speed for you on downhill gradients by
applying the brakes as required. Maintaining the
speed is dependent on the road surface condi-
tions and the downhill gradient and cannot
therefore be guaranteed in all situations.
You can set the speed to between 2.5 mph
(4 km/h) and 11 mph (18 km/h) using the brake
and accelerator pedals or the cruise control
lever.
RIf the vehicle is stationary, or its speed is less
than 2.5 mph (4 km/h) the speed is set to
2.5 mph (4 km/h).
RIf you drive faster than 11 mph (18 km/h) off-
road, DSR switches to standby mode. DSR
remains activated, but does not brake auto-
matically.
RIf you drive downhill slower than 11 mph
(18 km/h), DSR sets the speed to the previ-
ously set speed.
RDSR switches off automatically if you drive
faster than 28 mph (45 km/h).
Cruise control lever
:Activates DSR and stores the current or
higher speed
;Activates DSR and stores the current speed
=Activates DSR and stores the current or
lower speed
?Deactivates DSR
The cruise control lever is the uppermost lever
on the left of the steering column. For as long as
148Driving systems
Driving and parking

the LOW RANGE transmission ratio is engaged,
only use the cruise control lever to operate DSR.
When the LOW RANGE transmission ratio is dis-
engaged, use cruise control.
Activation conditions
In order to activate DSR, both activation condi-
tions must be fulfilled:
RThe LOW RANGE transmission ratio is
engaged. The+indicator lamp in the
instrument cluster lights up.
RThe vehicle is stationary or you are not driving faster than 11 mph (18 km/h).
Activating DSR
You can activate DSR when the vehicle is sta-
tionary or moving.
XBrake or accelerate the vehicle to the
required speed between 2.5 mph (4 km/h)
and 11 mph (18 km/h).
XBriefly push the cruise control lever up :or
down =.
or
XBriefly pull the cruise control lever towards
you ;.
XRelease the brake or accelerator pedal.
The current speed is stored. When the vehicle
is stationary, the speed is stored at 2.5
(4 km/h). DSR maintains the stored speed on
the downhill gradient and brakes automati-
cally.
When DSR is activated and the vehicle pulls
away, accelerates or brakes, the speed set cor-
responds to the speed at which the accelerator
or brake pedal is released. Thi s i
s only the case
if you are not driving faster than 11 mph
(18 km/h).
DSR status indicator in the on-board com-
puter
Vehicles with steering wheel buttons
LOW RANGE is engaged
RThe DSRmessage is displayed in the status
area of the on-board computer.
RDSR can be activated.
DSR is activated
RThe DSRmessage and the set speed are dis-
played in the status area of the on-board com-
puter. DSR is activated but is not intervening
RYou are driving at between 11 mph (18 km/h)
and 28 mph (45 km/h).
RThe
DSRmessage is displayed in the status
area of the on-board computer. Also, the
speed 11 mph (18 km/h) flashes.
DSR is activated but is not intervening
RYou are driving faster than 28 mph (45 km/h).
RThe DSRmessage is displayed in the status
area of the on-board computer. Also, the ---
message is displayed for 5 seconds.
DSR is activated but is not intervening
RThe DSR---message is displayed in the sta-
tus area of the on-board computer.
There is a malfunction in the Electronic Brak-
ing System (EBS). Visit a qualified specialist
workshop.
Vehicles without steering wheel buttons
LOW RANGE is engaged:
RThe DSRsymbol is displayed in the on-board
computer.
RDSR can be activated.
DSR is activated
RThe DSRsymbol and the set speed are dis-
played in the on-board computer.
DSR is activated but is not intervening
RYou are driving at between 11 mph (18 km/h)
and 28 mph (45 km/h).
RThe DSRsymbol is displayed in the on-board
computer. Also, the speed 11 mph (18 km/h)
flashes.
DSR is activated but is not intervening
RYou are driving faster than 28 mph (45 km/h).
RThe DSRsymbol is displayed in the on-board
computer. Also, the ---message is displayed
for 5 seconds.
DSR is activated but is not intervening
RThe DSRsymbol is displayed in the on-board
computer. Also, the ---message is perma-
nently displayed.
There is a malfunction in the Electronic Brak-
ing System (EBS). Visit a qualified specialist
workshop.
Setting the speed whilst driving downhill
You can set the speed to between 2.5 mph
(4 km/h) and 11 mph (18 km/h) using the brake
Driving system s149
Driving an d parking
Z

and accelerator pedals or the cruise control
lever.
XBrake or accelerate the vehicle to the
required speed on the downhill gradient.
XRelease the brake or accelerator pedal. The
current speed is stored.
or
XBriefly push the cruise control lever up :to
increase the speed or down =to reduce the
speed.
The last speed stored is increased or reduced
incrementally.
XRelease the cruise control lever. The current
speed is stored.
or
XPress and hold the cruise control lever up :
or down =until the desired speed has been
reached.
XRelease the cruise control lever.
The current speed is stored.
iIt may take a moment before the vehicle
brakes to the set speed. Take this delay into
account when setting the speed with the
cruise control lever.
Deactivating DSR
XBriefly press the cruise control lever
forward ?.
or
XAccelerate and drive faster than 28 mph
(45 km/h).
DSR deactivates automatically if:
Ryou are driving faster than 28 mph (45 km/h).
Ryou disengage th eLOW RANGE transmission
ratio.
Rthere is amalfunction in th eES P®or AB Ssys-
tem.
PARKTRONIC
Gene ral notes
PARKTRONI Cis an electronic parkin gaid. The
system is equipped wit hultrasonic sensor sin
th efron tand rear bumpers to monitor th earea
around your vehicle. PARKTRONI Cindicate svis -
ually and audibl yth edistanc ebetween your
vehicl eand an object.
Your vehicl efeatures tw oseparat esoun demit-
ters wit hdifferen tfrequencie sfor th ewarnin gtones. The warnin
granges in fron tof and behind
th evehicl eare indicate dby differen twarnin g
tones.
PARKTRONI Cis activated automatically when
you:
Rtur nth eke yto position 2in th eignition loc k
Rrelease theparkin gbrak eand
Rmov eth eselector lever to D,Nor R.
PARKTRONI Cis deactivated at speeds abov e
11 mph (18 km/h). PARKTRONI Cis reactivated
at speeds belo w10 mph (16 km/h).
Impor tant safety notes
PARKTRONI Cis only an aid. It canno treplac e
your own awareness of th eimmediat esurround-
ings. You are responsibl efor saf emaneuvering,
parkin gand pullin gaway. Whe nmaneuvering,
parkin gand pullin gaway, mak esur ethat there
are no persons, animals or objects in th emaneu-
verin garea .
!Pay particular attention to obstacles abov e
or belo wthesensor swhen parking, suc has
flower pot sor trailer towbars. PARKTRONI C
does no trecogniz esuc hobjects when they
are in th eimmediat evicinit yof th evehicle.
You could damage th evehicl eor objects .
PARKTRONI Ccan suffer interferenc efrom:
Rultrasonic source ssuc has atruck's
compressed-air brakes, an automati ccar
wash or apneumati cdrill
Rattachments to th evehicle, e.g. rear moun -
te dracks
Rnumber plates (vehicle license plates) that
are no taffixe dflat against th ebumper
Rdirty or icy sensor s
Remove adetachable trailer couplin gif it is no
longer required. PARKTRONI Cmeasures th e
minimum detection range to an obstacle from
th ebumper, no tth eball coupling.
Range ofthe sensor s
PARKTRONI Cdoes no taccoun tfor obstacles
that are:
Rbeneat hits detection range, e.g. persons, ani -
mals or objects
Rabov eits detection range, e.g. overhangin g
loads ,overhang sor truck loading ramps
150Driving systems
Driving and parking

iThis also applies if cruise control is activa-
ted.
This enables you to utilize the engine's braking
effect and you do not need to brake so heavily to
keep the correct speed. This relieves the load on
the brake system and prevents the brakes from
overheating and wearing too quickly. If you need
to brake additionally, to not depress the brake
pedal constantly, but periodically.
Driving tips
If the trailer begins to swing from side to side:
XDo not accelerate.
XDo not counter-steer.
XBrake if necessary.
iYou can reduce the risk of the trailer swing-
ing and rocking by retrofitting anti-roll bars or trailer stability programs. More information is
available from your authorized Sprinter
Dealer.
RMaintain a greater distance than you would
when driving without towing a trailer.
RAvoid sudden braking. Apply the brakes gen-
tly at first to allow the trailer brake to overrun.
Then, increase the brake force quickly.
RThe figures for the gradient climbing capabil-
ities from a standstill refer to sea level. When
driving in mountainous areas, note that the
power output of the engine, and with it its
gradient climbing capability, decrease with
increasing altitude.
Coupling up a trailer
Trailer coupled ready for use
XMake sure the selector lever of the automatic
transmission is in position P.
XApply the vehicle's parking brake.
XClose all doors.
XPosition the trailer horizontally behind your
vehicle.
iThe height of the ball neck changes accord-
ing to the load on the vehicle. In this case, use
a trailer with a height-adjustable trailer draw-
bar.
XCouple the trailer.
XEstablish all electrical and other connections to the trailer. When doing so, hook the break-
away cable of the trailer into eyelet :on the
ball coupling.
XRemove the objects that are preventing the
trailer from rolling, e.g. wheel chocks.
XRelease the trailer parking brake.
iThe subharness of the vehicle has a cable
connection to the brake lamp indicator lamp.
Observe the maximum permissible trailer
dimensions (width and length).
Most federal states and all Canadian provinces
require by law:
Rsafety chains between the towing vehicle and the trailer. The chains should be cross-wound
under the trailer drawbar. They must be fas-
tened to the vehicle's trailer coupling, not to
the bumper or the axle.
Leave enough slack in the chains. This allows
you to drive round tight corners.
Ra separate brake system for certain types of
trailer.
Ra safety shut-off for braked trailers. Find out
the specific requirements according to the
applicable laws.
If the trailer becomes detached from the tow-
ing vehicle, the safety feature triggers the
trailer brakes.
Towing a trailer
There are numerous legal requirements con-
cerning the towing of a trailer, e.g. speed restric-tions.
Many states require a separate functional brak-
ing system for your trailer once a certain weight
limit is exceeded. For your safety, it is recom-
mended to use a separate functional braking
system on any towed vehicle.
Make sure your vehicle/trailer combination
complies with local laws. This not only means
where you live, but also anywhere you are driv-
156Towing a trailer
Driving and parking

ing to. Information is available from the police
and local authorities.
Observe the following when towing a trailer:
RPractice driving around bends, stopping and
backing up at a place where there is no traffic.This enables you to gain experience and get
used to the new handling characteristics.
RBefore driving, check:
-that the trailer tow hitch and ball coupling
are secure
-that the safety switch for a braked trailer is
functioning properly
-that the safety chains are secure and not
damaged
-that the electrical connections are secure
-that the lights are working
-that the wheels are in good order and the
tire pressure is correct
RAdjust the exterior mirrors to provide an
unobstructed view of the rear section of the
trailer.
RIf the trailer is equipped with an individual
braking system, check before each journey
whether the brakes are functioning correctly.
RIf the trailer has electronically controlled
brakes, pull the vehicle/trailer combination
away carefully. Brake manually using the
brake controller and check that the brakes
are working.
RSecure the load on the trailer according to the
applicable specifications and current stand-
ards on securing loads (
Ypage 215).
RWhen driving with a trailer, check at regular
intervals that the load is secured and that the
brakes and lights are working.
RBear in mind that the handling will be less
stable when towing a trailer than when driving
without one. Avoid sudden steering move-
ments.
RThe vehicle/trailer combination is heavier,
accelerates more slowly and has a decreased
gradient climbing capability and a long er
brak

ing distance.
It is more susceptible to crosswinds and
requires cautious steering.
RIf possible, do not brake suddenly, but rather
moderately at first so that the trailer can acti-
vate its brakes. Then increase the force on the
brake pedal.
RIf the automatic transmission repeatedly
shifts between gears when driving on inclines, restrict the shift range. Select shift range
4,3,
2 or 1.
Driving in a low gear and at a low speed
reduces the risk of damaging the engine.
RWhen driving on a downhill gradient, shift to a
low gear and take advantage of the engine's
braking effect.
Avoid continuous brake application as this
may overheat the vehicle brakes and, if instal-
led, the trailer brakes.
RIf the coolant temperature increases dramat-
ically while the air-conditioning system is
switched on, switch off the air-conditioning
system.
Coolant heat can also be dissipated by
switching the airflow and the temperature of
the heater/air conditioning to the maximum
level. Open the windows if necessary.
RWhen overtaking, pay particular attention to
the extended length of your vehicle/trailer
combination.
Due to the length of your vehicle/trailer com-
bination you need an additional distance
before you can return to your original lane.
Uncoupling a trailer
GWARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overrun brake
is engaged.
!Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake.
XMake sure the selector lever of the automatic
transmission is in position P.
XApply the parking brake of the vehicle.
XClose all doors.
XApply the parking brake of the trailer.
XIn addition, secure the trailer against rolling
away with a wheel chock or similar object.
XRemove the trailer cable and safety chains
and decouple the trailer.
Towing a trailer157
Driving and parking
Z