
Load limit ....................................... 228
Roof rack  ....................................... 188
Split rear seat bench  .....................189
Terminology  ................................... 239
Vehicle maximum load on the tire  ... 241
Vehicle specification   
GLK 350  ........................................ 330
GLK 350 4MATIC  ........................... 330
Vehicle status message memory  .... 118
Vehicle tool kit  .................................. 260
Vehicle washing see Vehicle care                                        
Vehicle weights
see Vehicle specification                          
W
Warning sounds  
Driver’s or passenger’s seat belt  .....50
Parking brake  ................................ 272
Parktronic system  ..........................174
Seat belt telltale  ............................ 292
Warranty coverage  ............................ 328
Washer and headlamp cleaning
system  ................................................ 339
Washer fluid  
Mixing ratio  .................................... 339
Refilling  .......................................... 217
Washing the vehicle  .......................... 251
Wear pattern (tires)  .......................... 234
Weights (vehicle) see Vehicle specification                          
Wheel  
Changing  ....................................... 312
Removing  ....................................... 314
Spare  ............................................. 312
Tightening torque ........................... 317
Wheels, sizes  ..................................... 331
Wheels, Tires and  .............................. 218
Window curtain air bags  ..................... 41
Windows see Power windows                                  
Windows, cleaning  ............................ 255
Windshield  
Cleaning wiper blades .................... 255
Defogging  ...................................... 182
Washer fluid  ................................... 339
Wipers  ............................................. 93
Windshield wipers 
Replacing wiper blades  ..................310
Winter driving  
Instructions .................................... 243
Snow chains  .................................. 242
Tires ............................................... 241
Winter tires  ................................ 241, 331
Wood trims, cleaning  ........................ 25718IndexX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 18 

Exterior view
iThis Operator’s Manual describes all features, standard or optional, potentially available
for your vehicle at the time of purchase. Please be aware that your vehicle might not be
equipped with all features described in this manual.
FunctionPage:Tailgate71Power tailgate72Locking and unlocking66Unlocking and opening
manually300
;Rear window defroster184=Rear lamps303?Doors:Locking and unlocking66Unlocking/locking
manually299
AWipers93Wiper blades, replacing310Wiper blades, cleaning255BWindshield:FunctionPageWiping with washer fluid93Cleaning255CPanorama roof with power
tilt/sliding panel184
DExterior rear view mirrors84EHood214FFront lamps303GHeadlamp cleaning system91HFront towing eye322ITires and wheels218Rims and tires331JFuel filler flap212KRear towing eye32226Exterior viewAt a glance
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Headlamp cleaning system
The headlamps will be cleaned with a high-
pressure water jet automatically when the
engine is running and you have
R switched on the headlamps
and
R the windshield wipers have wiped the
windshield with washer fluid for the first
time
The headlamps are cleaned every tenth time
the windshield is washed with washer fluid.
The counter resets when you switch off the
ignition.
For information on filling up the washer
reservoir, see “Washer system and headlamp
cleaning system” ( Y page 217).
Corner-illuminating lamps
The corner-illuminating lamps improve
illumination of the area in the direction into
which you are turning.
The corner-illuminating lamps will only
operate in low ambient lighting conditions.
If you are driving faster than 25 mph
(40 km/h)  the corner-illuminating function is
not available.
Switching on
XMake sure the engine is running.XTurn the exterior lamp switch to position
L  or c  (Y  page 87).
or
XActivate the daytime running lamp mode
( Y  page 88).XSwitch on the left or right turn signal,
depending on whether you are turning left
or right.
The respective corner-illuminating lamp
comes on. If you have switched on the turn
signal for one side but turn the steering
wheel in the other direction, the corner-illuminating lamp comes on on the side of
the turn signal.
or
XTurn steering wheel in desired direction.
Driving forward: The corner-illuminating
lamp on the side of your steering direction
comes on.
Driving in reverse: The corner-illuminating
lamp opposite to your steering direction
comes on.
The corner-illuminating lamps will come on
automatically depending on the steering
angle, even if you did not switch on either turn
signal. If the corner-illuminating lamps came
on automatically, they will also go out
automatically depending on the steering
angle and vehicle speed.
The corner-illuminating lamps temporarily
come on on both sides of the vehicle if you
turn the steering wheel in one direction and
then again in the other direction shortly
thereafter.
The corner-illuminating lamp remains lit for a
short time only. It then goes out
automatically.
Switching off
XSwitch off the left or right turn signal.
or
XSteer straight ahead.
The corner-illuminating lamp goes out.
i There may be a brief delay before the
corner-illuminating lamps go out.
Lighting91Controls in detailX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 91Z 

:p Right rear reading lamp on/off;p Left rear reading lamp on/off
Wipers
Notes
! Do not operate the wipers when the
windshield/rear window is dry. Dust that
accumulates on a windshield/rear window
might scratch the glass and/or damage the
wiper blades when wiping occurs on a dry
windshield/rear window. If it is necessary
to operate the wipers in dry weather
conditions, always operate the wipers with
washer fluid.
! If the windshield wipers leave smears on
the windshield after the car has been driven
through an automatic car wash, then wax
or other residue is on the windshield.
Shortly after washing the car in an
automatic car wash, clean the windshield
with washer fluid.
Windshield wipers
XObserve notes on page (Y page 93).Switching on/off
Combination switch
1$ Windshield wipers off2Ä Slow intermittent wiping53Å Fast intermittent wiping64° Slow continuous wiping5¯ Fast continuous wipingBí Single wipe/ î Wiping with
washer fluid
XSwitch on the ignition.XTurn the combination switch to the desired
position, depending on the intensity of the
rain.
iWhen the windshield wipers are switched
on and you stop the vehicle, the wipers
operate more slowly.
Intermittent wiping 
Only switch on intermittent wiping under wet
weather conditions or in the presence of
precipitation.
! Vehicles with rain sensor: Do not leave
windshield wipers on an intermittent
setting when the vehicle is taken to an
automatic car wash or during windshield
cleaning. Windshield wipers will operate in
the presence of water sprayed on the
windshield, and windshield wipers may be
damaged as a result.
5Rain sensor operation with low sensitivity.6Rain sensor operation with high sensitivity.
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! Vehicles with rain sensor: If you have set
intermittent wiping, dirt on the surface of
the rain sensor or optical effects may cause
the windshield wipers to wipe in an
undesired fashion. This could then damage
the windshield wiper blades or scratch the
windshield. You should therefore switch off
the windshield wipers when weather
conditions are dry.
Vehicles with rain sensor: Intermittent wiping
interval is dependent on the wetness of the
windshield. After the initial wipe, pauses
between wipes are controlled by the rain
sensor automatically.
XTurn the combination switch to position
Ä or Å.
Intermittent wiping starts with selected
wiping interval.
Intermittent wiping is interrupted when the
vehicle is at a standstill and a front door is
opened. This protects persons getting into or
out of the vehicle from being sprayed.
Intermittent wiping will be continued when all
doors are closed andRthe automatic transmission is in drive
position D or reverse gear R
or
Rthe wiper setting is changed using the
combination switch
Single wipe
XPress the combination switch briefly in
direction of arrow B to the resistance
point.
The windshield wipers wipe one time
without washer fluid.
Wiping with washer fluid
XPress the combination switch in direction
of arrow B past the resistance point.
The windshield wipers operate with washer
fluid.
iTo prevent smears on the windshield or
noisy/chattering wiper blades, wipe with
washer fluid every now and then even when
it is raining.
For information on filling up the washer
reservoir, see “Washer system and headlamp
cleaning system” (Y page 217).
For information on cleaning the headlamps
with washer fluid, see “Headlamp cleaning
system” (Y page 91).
Rear window wiper/washer
XObserve notes on page (Y page 93).
The rear window wiper engages automatically
when the automatic transmission is shifted
into reverse gear R with the windshield wipers
switched on.
Combination switch
:è Rear window wiper switch2ô Wiping rear window with washer
fluid
3I Intermittent wiping40 Rear window wiper off5ô Wiping rear window with washer
fluid
XSwitch on the ignition.XTurn rear window wiper switch : to the
desired position.
A rear window wiper indicator appears in the
multifunction display when the rear window
wiper is activated.
For information on filling up the washer
reservoir, see “Washer system and headlamp
cleaning system” (Y page 217).
94WipersControls in detail
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XUsing a rag, slowly open cap :
approximately 1/2 turn counterclockwise
to relieve excess pressure.
XContinue turning cap : counterclockwise
and remove it.
The coolant level is correct if the level
Rfor cold coolant: reaches marking bar
= in coolant expansion tank ;
Rfor warm coolant: is approximately 0.6 in
(1.5 cm) higher
XAdd coolant as required.XScrew cap : back on and tighten it.
For more information on coolant, see the
“Technical data” section (Y page 334) and
(Y page 337).
Washer system and headlamp 
cleaning system
GWarning!
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
! Always use washer solvent/antifreeze
where temperatures may fall below
freezing point. Failure to do so could result
in damage to the washer system/fluid
reservoir.
! Only use washer fluid which is suitable for
plastic lenses. Improper washer fluid can
damage the plastic lenses of the
headlamps.
! Do not use distilled or deionized water in
the washer fluid reservoir. Otherwise, the
washer fluid level sensor could be
damaged.
Fluid for the washer system, rear window
washer system, and the headlamp cleaning
system is supplied from the washer fluid
reservoir.
During all seasons, use MB Windshield
Washer Concentrate “MB SummerFit”. Mix it
with water or premixed washer solvent/
antifreeze depending on the ambient
temperature (Y page 339).
XOpening washer fluid reservoir: Pull tab
of cap : upwards.
XRefill the washer fluid reservoir.XClosing washer fluid reservoir: Press
cap : onto filler hole until it engages.
For more information, see “Washer system
and headlamp cleaning system”
(Y page 335).
Brake fluid level
! If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum
mark or below, have the brake system
checked for brake pad thickness and leaks
immediately. Contact an authorized
Engine compartment217OperationX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 217Z     
![MERCEDES-BENZ GLK350 4MATIC 2010 X204 Owners Manual ModelCapacityFuels, coolants, 
lubricants, etc.Fuel tankAll models17.4 US gal (66.0 l)Premium unleaded
gasoline (Minimum
Posted Octane 91
[Avg. of
96 RON/86 MON])Fuel tank 
reserveAll modelsapprox. 2. MERCEDES-BENZ GLK350 4MATIC 2010 X204 Owners Manual ModelCapacityFuels, coolants, 
lubricants, etc.Fuel tankAll models17.4 US gal (66.0 l)Premium unleaded
gasoline (Minimum
Posted Octane 91
[Avg. of
96 RON/86 MON])Fuel tank 
reserveAll modelsapprox. 2.](/manual-img/4/3527/w960_3527-336.png)
ModelCapacityFuels, coolants, 
lubricants, etc.Fuel tankAll models17.4 US gal (66.0 l)Premium unleaded
gasoline (Minimum
Posted Octane 91
[Avg. of
96 RON/86 MON])Fuel tank 
reserveAll modelsapprox. 2.1 US gal (8.0 l)Air 
conditioning 
systemAll models—R134a refrigerant
and special
PAG lubricant oil
(never R 12)Washer system 
and headlamp 
cleaning 
systemAll models6.3 US qt (6.0 l)MB Windshield
Washer
Concentrate 27
( Y  page 339)
Washer fluid mixing
ratio ( Y page 339)Approved engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for our
service intervals. Therefore, only use
approved engine oils and oil filters required
for vehicles with the Maintenance System.
For a listing of approved engine oils and oil
filters, contact an authorized Mercedes-Benz
Center or visit  www.mbusa.com  (USA only).
!  Using engine oils and oil filters of a
specification other than those expressly
required for the Maintenance System, or
changing of oil and oil filter at change
intervals longer than those called for by the
Maintenance System will result in engine or
emission control system damage not
covered by the Mercedes-Benz Limited
Warranty.
Please follow Maintenance System
recommendations for scheduled oil
changes. Failure to do so will result in
engine or emission control system damagenot covered by the Mercedes-Benz Limited
Warranty.
Mercedes-Benz recommends MOBIL OIL.
Use the table below to determine the
MB sheet number.ModelEngine,
typeMB sheet
numberGLK 350 28272229.5GLK 350 4MATIC272229.5
i
MB sheet numbers are printed on the
outside of oil containers.
27 Mixed with water or commercially available premixed washer solvent/antifreeze.
28 USA only.Fuels, coolants, lubricants, etc.335Technical dataX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 335Z 

Washer system and headlamp 
cleaning systemGWarning!
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
XUse MB Windshield Washer Concentrate
“MB SummerFit”.XMix with water for temperatures above
freezing point.XMix with commercially available premixed
washer solvent/antifreeze for
temperatures below freezing point.
Washer fluid mixing ratio 
For temperatures above the freezing point:
1 part “MB SummerFit” to 100 parts water
(1.34 fl oz [40 ml] “MB SummerFit” to 1 gal
[4.0 l] water)
For temperatures below freezing point:
1 part “MB SummerFit” to 100 parts solvent
(1.34 fl oz [40 ml] “MB SummerFit” to 1 gal
[4.0 l] solvent)
Fuels, coolants, lubricants, etc.339Technical dataX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 339Z