cooling MERCEDES-BENZ GLK-CLASS SUV 2013 User Guide

Problems with the rear window defroster
Problem Possible causes/consequences and
0050 SolutionsThe rear window
defroster has
deactivated
prematurely or cannot
be activated. The battery has not been sufficiently charged.
X
Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again. Activating/deactivating air-
recirculation mode
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the
vehicle will then be recirculated.
The operation of air-recirculation mode
is the
same for all control panels.
X Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X To activate: press the 0072 button.
The indicator lamp
in the
0072

button lights
up.
i In the event of high
pollution levels12
or at
high outside temperatures, air-
recirculation mode is automatically
activated. When air-recirculation mode is
activated automatically, the indicator lamp
in the 0072 button is not lit.
Outside air is added after about
30 minutes.
X To deactivate: press the 0072 button.
The indicator lamp in the 0072

button goes
out. i
Air-recirculation mode deactivates
automatically:
R after approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes at
outside temperatures above
approximately 41 ‡(5

†) if the "Cooling
with air dehumidification" function is
activated Activating/deactivating the residual
heat function
The residual heat function is

only available in
vehicles for Canada with 3-zone automatic
climate control.
It is possible to make use of the residual heat
of the engine to continue heating the vehicle
for approximately 30 minutes after the engine
has been switched off. The heating time
depends on the temperature that has been
set.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
12 3-zone automatic climate control only.136
Operating the climate control systems
Climate control

to cool its contents. The level of airflow
depends on the airflow and air distribution
settings.
!
Close the air vent when heating the
vehicle.
At high outside temperatures, open the air
vent and activate the "cooling with air
dehumidification" function. Otherwise,
temperature-sensitive items stored in the
glove box could be damaged. 0043
Air vent thumbwheel
0044 Air vent
X To open/close: turn thumbwheel 0043
clockwise or counter-clockwise. Setting the rear-compartment air
vents
0043
Rear-compartment air vent thumbwheel
0044 Rear-compartment air vent, right 0087
Rear control panel, only with 3-zone
automatic climate control 13
0085 Rear-compartment air vent, left
X To open/close: turn thumbwheel 0043 up or
down.
13 Canada only.138
Setting the air ventsClimate control

Display messages Possible causes/consequences and
0050 SolutionsAdaptive Highbeam
Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Highbeam
Assist Currently
Unavailable See
Operator's Manual Adaptive Highbeam Assist is deactivated and temporarily
inoperative. Possible causes are:
R
the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational again,
the Adaptive Highbeam Assist Now Available message is
displayed.
Adaptive Highbeam Assist is operational again. Engine
Display messages Possible causes/consequences and
0050 Solutions00BD
Check Coolant
Level See
Operator's Manual The coolant level is too low.
!
Avoid making long journeys with
too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 302).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop. 00AC The fan motor is faulty.
X
At coolant temperatures below 248 ‡ (120 †) drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. Display messages
243
On-board computer and displays Z

Problems with the 115 V power socket
Problem Possible causes/consequences and
0050 SolutionsThe warning lamp on
the 115 V power
socket
is not lit. The on-board voltage is too low because the battery is too weak.
X
Start the engine.
or
X Charge the battery ( Y page 316).
If the indicator lamp still does not light up:
X Visit a qualified specialist workshop. The temperature of the DC/AC converter is temporarily too high.
X
Remove the electronic device connector from the 115 V socket.
X Let the DC/AC converter cool down.
If the indicator lamp still does not light up after cooling down the
converter:
X Visit a qualified specialist workshop. You have connected a small electronic device that has a constant
nominal power of less than 150 W, but a very high switch-on
current. This device will not work. If you connect such a device,
the 115 V power socket will not supply it with power.
X
Connect a suitable device. mbrace
Important safety notes !
You must have a license agreement to
activate the mbrace service. Make sure
that your system is activated
and ready for
use. To register, press the 00D9 MB Info call
button. If any of the steps mentioned are
not carried out, the system may not be
activated.
If you have questions about the activation,
contact one of the following telephone
hotlines:
R USA: Mercedes-Benz Customer
Assistance Center at
1-800-FOR-MERCedes
(1-800-367-6372) or 1-866-990-9007
R Canada: Customer Service at
1-888-923-8367 Shortly after successfully registering with the
mbrace
service (Canada:
TELEAID), a

user ID
and password will be sent to you by post. USA
only: you can use this password to log onto
the mbrace area under "Owners Online" at
http://www.mbusa.com .
The mbrace system is available if:
R it has been activated and is operational
R the corresponding mobile phone network
is available for transmitting data to the
Customer Center
R a service subscription is available
R the starter battery is sufficiently charged
i Determining the location of the vehicle on
a map is only possible if:
R GPS reception is available.
R the vehicle position can be forwarded to
the Customer Assistance Center. Features
283
Stowage and features Z

Damage to the engine or exhaust system is
caused by the following:
R
using engine oils and oil
filters that have
not been specifically approved for the
service system
R replacing engine oil and oil filters after
the interval for replacement specified by
the service system has been exceeded
R using engine oil additives.
! Do not add too much oil. If the oil level is
above the "max" mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic
converter. Have excess oil siphoned off. Example: engine oil cap
X
Turn cap 0043 counter-clockwise and remove
it.
X Add engine oil.
If the oil level is at or below the MIN mark
on the oil dipstick, add

1.1 US qt (1.0 liter)
of engine oil.
X Replace cap 0043 on the filler neck and turn
clockwise.
Ensure that the cap locks into place
securely.
X Check the oil level again with the oil
dipstick (Y page 301).
Further information on engine oil
(Y page 369). Checking and adding other service
products
Checking coolant level G
WARNING
The engine cooling system is pressurized,
particularly when the engine is warm. When
opening the cap, you could

be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
X Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Y
page 141).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †). X
Slowly turn cap 0043 half a turn counter-
clockwise and allow excess pressure to
escape.
X Turn cap 0043 further
counter-clockwise and
remove it.
If the coolant is at the level of marker bar
0087 in the filler neck when cold, there is
enough coolant in coolant expansion
tank 0044

.302
Engine compartment
Maintenance and care

Coolant
Important safety notes G
WARNING
If antifreeze comes into contact with hot
components in the engine compartment, it
may ignite. There is a risk of fire and injury.
Let the engine cool down before you add
antifreeze. Make sure that antifreeze is not
spilled next to the filler neck. Thoroughly
clean the antifreeze from components
before
starting the engine.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be
found in the Mercedes-Benz Specifications
for Service Products, MB Specifications for
Service Products 310.1, e.g. on the
Internet at
http://bevo.mercedes-benz.com. Or
contact a qualified specialist workshop.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
When handling coolant, observe the
important safety notes on service products
(Y page 365).
The coolant is a mixture of water and
antifreeze/corrosion inhibitor. It performs
the following tasks:
R corrosion protection
R antifreeze protection
R raising the boiling point
If the coolant has antifreeze protection down
to -35 ‡ (-37 †), the boiling point of the
coolant during operation is approximately
266 ‡ (130 †). The antifreeze/corrosion inhibitor
concentration in the engine cooling system
should:
R
be at least 50%. This

will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †).
R not exceed 55% (antifreeze protection
down to -49 ‡ [-45 †]). Otherwise, heat
will not be dissipated as effectively.
If the vehicle has lost coolant, add equal
amounts of water and antifreeze/corrosion
inhibitor.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor concentrate in
accordance with MB Specifications for
Service Products 310.1.
The coolant is checked with every
maintenance interval at a qualified specialist
workshop.
i When the vehicle is first delivered, it is
filled with a coolant mixture that ensures
adequate antifreeze and corrosion
protection.
Filling capacities Model Capacity
GLK 250 BlueTEC
approx. 10.6 US qt
(10.0 l) GLK 350
BlueEFFICIENCY
GLK 350 4MATIC
BlueEFFICIENCY
approx. 8.9 US qt
(8.4 l) i
Use MB 325.0 or MB 326.0 corrosion
inhibitor/antifreeze. Service products and filling capacities
371
Technical data Z

Dimensions and weights
Model 0043
Opening height 0044
Max.
headroom GLK 250
BlueTEC
4MATIC
82.2 in
(2087 mm) 77.0 in
(1955 mm) All other
models
82.1 in
(2086 mm) 76.9 in
(1954 mm) Missing values were not available at time of
going to print.
All models
Vehicle length
178.6 in (4536 mm)
Vehicle width
including exterior
mirrors
79.4 in (2016 mm)
Wheelbase
108.5 in (2755 mm)
Turning radius
38.2 ft (11.65 m)
Maximum roof load
GLK 250 BlueTEC
Vehicle height
66.7 in (1694 mm)
Ground clearance
8.0 in (204 mm) GLK 350
BlueEFFICIENCY
GLK 350 4MATIC
BlueEFFICIENCY
Vehicle height
66.7 in (1693 mm)
Ground clearance
8.2 in (208 mm)
Trailer tow hitch
Mounting dimensions
! If you have a trailer tow hitch retrofitted,
changes to the engine cooling system and
drive train may be necessary,
depending on
the vehicle type. Anchorage points for the trailer tow hitch
(example)
0043
Anchorage points
0044 Rear axle center line Trailer loads
Missing values were not available at time of
going to print. 374
Trailer tow hitch
Technical data