brake fluid MERCEDES-BENZ M-Class 2015 W166 Owner's Manual

BAS PLUS (Brake Assist System
PLUS)
.................................................... 69
Battery (SmartKey) Checking .......................................... 83
Important safety notes .................... 83
Replacing ......................................... 83
Battery (vehicle)
Charging ........................................ 389
Display message ............................ 301
Important safety notes .................. 387
Jump starting ................................. 391
Overview ........................................ 387
Belt
see Seat belts
Blind Spot Assist
Activating/deactivating ................. 276
Display message ............................ 308
Notes/function .............................. 237
Trailer towing ................................. 239
see Active Blind Spot Assist
BlueTEC
Adding DEF .................................... 180
BlueTEC (DEF) .................................... 451
Brake Assist see BAS (Brake Assist System)
Brake fluid
Display message ............................ 291
Notes ............................................. 453
Brake lamps
Changing bulb s.............................. 132
Display message ............................ 298
Brakes
ABS .................................................. 68
Adaptive Brake Assist ...................... 71
BAS .................................................. 68
BAS PLUS ........................................ 69
Brake fluid (notes) ......................... 453
Display message ............................ 285
High-performance brake system .... 189
Important safety notes .................. 188
Maintenance .................................. 189
Parking brake ................................ 184
Riding tips ...................................... 188
Warning lamp ................................. 320
Breakdown
see Flat tire
see Towing away Brightness control (instrument
cluster lighting)
................................... 35
Bulbs see Replacing bulbs C
California Important notice for retail cus-
tomers and lessees .......................... 26
Calling up a malfunction
see Display messages
Car
see Vehicle
Care
360° camera ................................. 376
Carpets .......................................... 379
Car wash ........................................ 372
Displa y........................................... 377
Exhaust pipe .................................. 376
Exterior lights ................................ 375
Gear or selector lever .................... 378
Interior ........................................... 377
Matte finish ................................... 374
Night View Assist Plus ................... 377
Notes ............................................. 371
Paint .............................................. 373
Plastic trim .................................... 378
Power washe r................................ 373
Rear view camera .......................... 376
Roof lining ...................................... 379
Seat belt ........................................ 379
Seat cover ..................................... 378
Sensors ......................................... 375
Steering wheel ............................... 378
Trim pieces .................................... 378
Washing by hand ........................... 373
Wheels ........................................... 374
Windows ........................................ 375
Wiper blades .................................. 375
Wooden trim .................................. 378
Cargo compartment cover
Notes/how to use ......................... 340
Cargo compartment enlargement
Important safety notes .................. 337
Cargo compartment floor
Opening/closing ............................ 344
Stowage well (under )..................... 344 6
Index

Important safety guidelines .............46
Introduction .....................................46
Releasin g......................................... 49
Switching belt adjustment on/off
(on-board computer) ...................... 280
Warning lamp ................................. 318
Warning lamp (function) ................... 49
Seats
Adjusting (electrically) ................... 106
Adjusting the head restraint .......... 106
Cleaning the cover ......................... 378
Correct driver's seat position ........ 104
Folding the rear bench seat for-
wards/back ................................... 337
Important safety notes .................. 105
Overview ........................................ 105
Seat heating problem .................... 110
Seat ventilation problem ................ 111
Storing settings (memory func-
tion) ............................................... 116
Switching seat heating on/of f....... 109
Switching seat ventilation on/of f.. 110
Securing hooks .................................. 340
Selector lever Cleaning ......................................... 378
Sensors (cleaning instructions) ....... 375
Service menu (on-board com-
puter) .................................................. 276
Service products Brake fluid ..................................... 453
Coolant (engine) ............................ 453
DEF special additives ..................... 451
Engine oil ....................................... 452
Fuel ................................................ 448
Important safety notes .................. 447
Refrigerant (air-conditioning sys-
tem) ............................................... 455
Washer fluid ................................... 454
Settings
Factory (on-board computer) ......... 281
On-board computer ....................... 277
Setting the air distribution ............... 148
Setting the airflow ............................ 148
SETUP (on-board computer) ............. 281
Side impact air bag ............................. 52
Side marker lamp (display mes-
sage) ................................................... 299 Side marker lamps (changing
bulbs)
................................................. 131
Side windows Cleaning ......................................... 375
Convenience closing feature ............ 95
Convenience opening feature .......... 95
Important safety information ........... 93
Opening/closing .............................. 94
Overview .......................................... 93
Problem (malfunction) ..................... 97
Resetting ......................................... 96
Sliding sunroof
Important safety notes .................... 97
Opening/closing .............................. 98
Problem (malfunction) ................... 101
Resetting ......................................... 98
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery ....................... 83
Changing the programming ............. 81
Checking the battery ....................... 83
Convenience closing feature ............ 95
Convenience opening feature .......... 95
Display message ............................ 317
Door central locking/unlocking ....... 80
Important safety notes .................... 80
Loss ................................................. 85
Mechanical key ................................ 82
Overview .......................................... 80
Positions (ignition lock) ................. 157
Problem (malfunction) ..................... 85
Starting the engine ........................ 160
Snow chains
Information .................................... 403
Snow drive program ....................... 248
Sockets
Center console .............................. 349
General notes ................................ 349
Luggage compartment ................... 350
Rear compartment ......................... 350
Specialist workshop ............................ 29
Special seat belt retractor .................. 61
Speed, controlling see Cruise control
Speedometer
Digital ............................................ 270 18
Index

Trim pieces (cleaning instruc-
tions)
.................................................. 378
Trip computer (on-board com-
puter) .................................................. 269
Trip odometer Calling up ....................................... 269
Resetting (on-board computer) ...... 270
Trunk
see Tailgate
Turn signals
Display message ............................ 297
Switching on/off ........................... 123
TWR (Tongue Weight Rating) (defi-
nition) ................................................. 422
Type identification plate see Vehicle identification plate U
Unlocking Emergency unlocking ....................... 88
From inside the vehicle (central
unlocking button) ............................. 87 V
Vanity mirror (in the sun visor) ........ 347
Vehicle Correct use ...................................... 29
Data acquisition ............................... 30
Display message ............................ 315
Equipment ....................................... 25
Individual settings .......................... 277
Limited Warranty ............................. 30
Loading .......................................... 412
Locking (in an emergency) ............... 88
Locking (SmartKey) .......................... 80
Lowering ........................................ 428
Maintenance .................................... 26
Parking for a long period ................ 185
Pulling away ................................... 160
Raising ........................................... 425
Reporting problems ......................... 29
Securing from rolling away ............ 424
Towing away .................................. 393
Transporting .................................. 395
Unlocking (in an emergency) ........... 88 Unlocking (SmartKey) ...................... 80
Vehicle data ................................... 456
Vehicle battery
see Battery (vehicle)
Vehicle data ....................................... 456
Vehicle data (off-road driving) Approach/departure angle ............ 458
Fording depth ................................ 457
Maximum gradient climbing abil-
ity .................................................. 458
Vehicle dimensions ........................... 456
Vehicle emergency locking ................ 88
Vehicle identification number see VIN
Vehicle identification plate .............. 446
Vehicle level AMG adaptive sport suspension
system ........................................... 216
Vehicle level (display message) ....... 304
Vehicle maintenance see ASSYST PLUS
Vehicle tool kit .................................. 382
Video Operating the DVD ........................ .273
VIN ...................................................... 446 W
Warning and indicator lamps ABS ................................................ 321
Brakes .......................................... .320
Check Engine ................................. 327
Coolant .......................................... 328
Distance warning ........................... 330
DISTRONIC PLUS ........................... 330
ESP ®
.............................................. 323
ESP ®
OFF ....................................... 324
Overview .......................................... 36
PASSENGER AIR BAG OFF .............. .45
Reserve fuel .................................. .327
Restraint system ............................ 326
Seat belt ........................................ 318
Tire pressure monitor .................... 331
Warranty .............................................. 25
Washer fluid Display message ............................ 316 22
Index

The hazard warning lamps automatically
switch on if:
R an air bag is deployed or
R the vehicle decelerates rapidly from a
speed of above 45 mph (70 km/h) and
comes to a standstill
The hazard warning lamps switch off auto-
matically if the vehicle reaches a speed of
above 6 mph (10 km/h) again after a full
brake application.
i The hazard warning lamps still operate if
the ignition is switched off. Headlamp cleaning system
The headlamps are cleaned automatically if
the "Wipe with washer fluid" function is oper- ated five times (Y page 132) while the lights
are on and the engine is running. When you
switch off the ignition, the automatic head-
lamp cleaning system is reset and counting is
resumed from 0. Active light function
The active light function is a system that
moves the headlamps according to the steer-
ing movements of the front wheels. In this
way, relevant areas remain illuminated while
driving. This allows you to recognize pedes-
trians, cyclists and animals.
Active: when the lights are switched on. Cornering light function
The cornering light function improves the illu-
mination of the road over a wide angle in the direction you are turning, enabling better vis-
ibility in tight bends, for example. It can only
be activated when the low-beam headlamps
are switched on.
Active:
R if you are driving at speeds below 25 mph
(40 km/h) and switch on the turn signal or
turn the steering wheel
R if you are driving at speeds between
25 mph (40 km/ h)and 45 mph (70 km/h)
and turn the steering wheel
The cornering lamp may remain lit for a short
time, but is automatically switched off after
no more than three minutes. Exterior lighting
125Lights and windshield wipers Z

Changing the rear bulbs
Opening and closing the service flap Left-hand service flap
Right-hand service flap
You must open the service flap in the cargo
compartment before you can change the
bulbs in the brake lamp.
X To open: release service flap 0043at the top,
e.g. with a screwdriver, and swing it down- ward in the direction of the arrow.
X Right side: remove the first-aid kit before-
hand and pull the parcel net down.
X To close: reinsert service flap 0043.Brake lamp X
Switch off the lights.
X Open the cargo compartment.
X Open the service flap (Y page 132).
X Turn bulb holder 0043counter-clockwise and
remove it.
X Take bulb out of bulb holder 0043.
X Insert the new bulb into bulb holder 0043.
X Insert bulb holder 0043into the lamp and turn
it clockwise.
X Close the service flap (Y page 132). Windshield wipers
Switching the windshield wipers
on/off
! Do not operate the windshield wipers
when the windshield is dry, as this could
damage the wiper blades. Moreover, dust
that has collected on the windshield can
scratch the glass if wiping takes place when the windshield is dry.
If it is necessary to switch on the windshield wipers in dry weather conditions, always
use washer fluid when operating the wind-
shield wipers.
! If the windshield wipers leave smears on
the windshield after the vehicle has been
washed in an automatic car wash, wax or
other residues may be the reason for this.
Clean the windshield using washer fluid
after washing the vehicle in an automatic
car wash. 132
Windshield wipersLights and windshield wipers

Servicing the brakes
!
If the red brake warning lamp lights up in
the instrument cluster and you hear a warn- ing tone while the engine is running, the
brake fluid level may be too low. Observe
additional warning messages in the multi-
function display.
The brake fluid level may be too low due to brake pad wear or leaking brake lines.
Have the brake system checked immedi-
ately. This work should be carried out at a
qualified specialist workshop.
! A function or performance test should
only be carried out on a 2-axle dynamom-
eter. If you are planning to have the vehicle tested on such a dynamometer, contact an
authorized Mercedes-Benz Center to
obtain further information first. Otherwise,
you could damage the drive train or the
brake system.
! Because ESP ®
is an automatic system,
the engine and ignition must be switched
off (SmartKey in position 0or 1or Start/
Stop button in position 0or 1) when the
electric parking brake is being tested on a
brake dynamometer (maximum
10 seconds).
Braking triggered automatically by ESP ®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a quali-
fied specialist workshop. Consult a qualified
specialist workshop to arrange this.
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 function- ality of your brakes at regular intervals. To doso, depress the brake pedal firmly when driv-
ing at a high speed. This improves the grip of
the brake pads.
You can find a description of Brake Assist
(BAS) on (Y page 68) or of BAS PLUS on
(Y page 69). Mercedes-Benz recommends that you only
have brake pads/linings installed on your
vehicle which have been approved for
Mercedes-Benz vehicles or which correspond
to an equivalent quality standard. Brake
pads/linings which have not been approved
for Mercedes-Benz vehicles or which are not
of an equivalent quality could affect your vehi-
cle's operating safety.
Mercedes-Benz recommends that you only
use brake fluid that has been specially
approved for your vehicle by Mercedes-Benz,
or which corresponds to an equivalent quality standard. Brake fluid which has not been
approved for Mercedes-Benz vehicles or
which is not of an equivalent quality could
affect your vehicle's operating safety.
High-performance brake system for
AMG vehicles The high-performance brake system is only
available on AMG vehicles.
The high-performance brake system is
designed for heavy loads. This may lead to
noise when braking. This will depend on:
R speed
R braking force
R environmental conditions, such as temper-
ature and humidity
The wear of individual components of the
brake system, such as the brake pads/linings
or brake discs, depends on the individual driv-
ing style and operating conditions.
For this reason, it is impossible to state a
mileage that will be valid under all circum-
stances. An aggressive driving style will lead
to high wear. You can obtain further informa- tion about this from your authorized
Mercedes-Benz Center.
New and replaced brake pads and discs only
reach their optimum braking effect after sev-
eral hundred kilometers of driving. Compen-
sate for this by applying greater force to the
brake pedal. Keep this in mind, and adapt Driving tips
189Driving and parking Z

Display messages
Possible causes/consequences and
0050
0050Solutions 0027(USA
only)004D
(Canada
only)
Check Brake Fluid Check Brake Fluid
Level Level There is not enough brake fluid in the brake fluid reservoir. In
addition, the
0027(USA only)/004D (Canada only) warning lamp
lights up in the instrument cluster and a warning tone sounds.
G WARNING
The braking effect may be impaired.
There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 182).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. 0026
Brake Wear Brake Wear The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop. 0053
mbrace Inoperative mbrace Inoperative USA only: one or more of the main functions in the mbrace system
are malfunctioning.
Canada only: one or more of the main functions of the TELEAID
system are malfunctioning.
X USA only: have the mbrace system checked at a qualified spe-
cialist workshop.
X Canada only: have the TELEAID system checked at a qualified
specialist workshop. PRE-SAFE PRE-SAFE
Inoperative See Inoperative See
Operator's Manual Operator's Manual
Important functions of PRE-SAFE
®
have failed. All other occupant
safety systems, e.g. air bags, remain available.
X Visit a qualified specialist workshop immediately. Display
messages
291On-board computer and displays Z

Safety systems
Problem
Possible causes/consequences and
0050
0050Solutions 0027
(USA only)
004D (Canada only)
The red brake system
warning lamp comes on while the engine is run-
ning. A warning tone
also sounds. G
WARNING
The brake boosting effect is malfunctioning and the braking char- acteristics may be affected.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 182).
X Consult a qualified specialist workshop.
X Observe the additional display messages in the multifunction
display. 0027
(USA only)
004D (Canada only)
The red brake system
warning lamp comes on while the engine is run-
ning. A warning tone
also sounds. There is not enough brake fluid in the brake fluid reservoir.
G WARNING
The braking effect may be impaired.
There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 182).
X Do not add brake fluid. Adding more will not remedy the mal-
function.
X Consult a qualified specialist workshop.
X Observe the additional display messages in the multifunction
display. 320
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Scratches, corrosive deposits, areas affected
by corrosion and damage caused by inade-
quate care cannot always be completely
repaired. In such cases, visit a qualified spe-
cialist workshop.
X Remove dirt immediately, where possible,
while avoiding rubbing too hard.
X Soak insect remains with insect remover
and rinse off the treated areas afterwards.
X Soak bird droppings with water and rinse
off the treated areas afterwards.
X Remove coolant, brake fluid, tree resin,
oils, fuels and greases by rubbing gently
with a cloth soaked in petroleum ether or
lighter fluid.
X Use tar remover to remove tar stains.
X Use silicone remover to remove wax.
If water no longer forms "beads" on the paint
surface, use the paint care products recom-
mended and approved by Mercedes-Benz.
This is the case approximately every three to
five months, depending on the climate con-
ditions and the care product used.
If dirt has penetrated the paint surface or if
the paint has become dull, the paint cleaner
recommended and approved by Mercedes-
Benz should be used.
Do not use these care products in the sun or
on the hood while the hood is hot.
X Use a suitable touch-up stick, e.g. MB
Touch-Up Stick, to repair slight damage to
the paintwork quickly and provisionally.
Matte finish care !
Never polish the vehicle or the light alloy
wheels. Polishing causes the finish to
shine. !
The following may cause the paint to
become shiny and thus reduce the matte
effect:
R Vigorous rubbing with unsuitable mate-
rials.
R Frequent use of car washes.
R Washing the vehicle in direct sunlight.
! Never use paint cleaner, buffing or pol-
ishing products, or gloss preserver, e.g.
wax. These products are only suitable for
high-gloss surfaces. Their use on vehicles
with matte finish leads to considerable sur- face damage (shiny, spotted areas).
Always have paintwork repairs carried out
at a qualified specialist workshop.
! Do not use wash programs with a hot wax
treatment under any circumstances.
Observe these notes if your vehicle has a
clear matte finish. This will help you to avoid
damage to the paintwork due to incorrect
treatment.
These notes also apply to light alloy wheels
with a clear matte finish.
i The vehicle should preferably be washed
by hand using a soft sponge, car shampoo
and plenty of water.
i Use only insect remover and car shampoo
from the range of recommended and
approved Mercedes-Benz care products. Cleaning the vehicle parts
Cleaning the wheels !
Do not use acidic wheel cleaning products
to remove brake dust. This could damage
wheel bolts and brake components.
! Do not park the vehicle for an extended
period straight after cleaning it, particularly after having cleaned the wheels with wheel cleaner. Wheel cleaners could cause
increased corrosion of the brake discs and
brake pads/linings. For this reason, you 374
CareMaintenance and care

VIN
X
Open the front right-hand door.
X Open cover 0043in the direction of the arrow
and remove it.
You will see the VIN.
The VIN can also be found in the following
locations:
R on the lower edge of the windshield
(Y page 447)
R on the vehicle identification plate
(Y page 446) Engine number
0043
Emission control information plate,
including the certification of both federal
and Californian emissions standards
0044 Engine number (stamped into the crank-
case)
0087 VIN (on the lower edge of the windshield) Service products and filling capaci-
ties
Important safety notes
G
WARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels of the respective original containers. Always
store service products sealed in their original containers. Always keep service products out
of the reach of children. H
Environmental note
Dispose of service products in an environ-
mentally responsible manner.
Service products include the following:
R Fuels
R Exhaust gas aftertreatment additives, e.g.
DEF
R Lubricants (e.g. engine oil, transmission oil)
R Coolant
R Brake fluid
R Windshield washer fluid
R Climate control system refrigerant
Comply with all valid regulations with respect to handling, storing, and disposing of service
fluids.
Components and service products must be
matched. You should therefore only use prod- ucts that have been tested and approved by
Mercedes-Benz.
Information on tested and approved products
can be obtained at an authorized Mercedes-
Benz Center or on the Internet at
http://bevo.mercedes-benz.com.
You can recognize service products approved by Mercedes-Benz by the following inscrip-
tion on the containers:
R MB-Freigabe (e.g. MB-Freigabe 229.51)
R MB Approval (e.g. MB Approval 229.51) Service products and filling capacities
447Technical data Z