
Starting the engine with the
SmartKey .......................................
143
Starting with KEYLESS-GO ............. 143
Switching off .................................. 160
Tow-starting (vehicle) ..................... 323
Engine, jump starting
see Jump starting (engine)
Engine electronics
Problem (malfunction) ...................147
Engine oil
Adding ........................................... 301
Additives ........................................ 370
Checking the oil level ..................... 300
Checking the oil level using the
dipstick .......................................... 301
Display message ............................ 245
Filling capacity ............................... 370
Notes about oil grades ................... 369
Notes on oil level/consumption .... 300
Viscosity ........................................ 370
ESP ®
(Electronic Stability
Program) Deactivating/activating ................... 67
Deactivating/activating (AMG
vehicles) .......................................... 68
Display message ............................ 232
ETS/4ETS ........................................ 66
Function/notes ......................... 66, 67
Important safety information ........... 66
Trailer stabilization ........................... 69
Warning lamp ................................. 261
ETS/4ETS (Electronic Traction
System) ................................................ 66
Exhaust check ................................... 162
Exhaust tail pipe (cleaning
instructions) ...................................... 307
Exterior lighting Setting options .............................. 110
see Lights
Exterior mirrors
Adjusting ....................................... 103
Dipping (automatic) .......................105
Folding in/out (automatically) ....... 104
Folding in/out (electrically) ........... 104
Folding in when locking (on-board
computer) ...................................... 230
Out of position (troubleshooting) ...105 Setting ...........................................
104
Storing settings (memory
function) ........................................ 106
Storing the parking position ..........105 F
Filler cap see Fuel filler flap
First-aid kit ......................................... 312
Flat tire MOExtended run-flat system ......... 313
Preparing the vehicle .....................312
see Emergency spare wheel
Floormat ............................................. 295
Fog lamps Switching on/off ........................... 111
Folding the rear bench seat
forwards/back .................................. 272
Fording On flooded roads ........................... 166
Front fog lamps
Display message ............................ 241
Switching on/off ........................... 111
Fuel
Additives ........................................ 367
Consumption statistics ..................219
Displaying the current
consumption .................................. 220
Displaying the range ...................... 220
Driving tips .................................... 162
Fuel gauge ....................................... 31
Grade (gasoline) ............................ 367
Important safety notes .................. 366
Premium-grade unleaded gasoline . 367
Problem (malfunction) ...................157
Quality (diesel) ............................... 368
Refueling ........................................ 154
Tank content/reserve fuel .............366
Fuel filler flap
Opening/closing ............................ 155
Fuel filter (display message) ............246
Fuel level Calling up the range (on-board
computer) ...................................... 22010
Index

Fuel tank
Capacity ........................................ 366
Problem (malfunction) ...................157
see Fuel tank
Fuse allocation chart (vehicle tool
kit) ...................................................... 312
Fuses Allocation chart ............................. 323
Before changing
.............................323
Dashboard fuse box ....................... 323
Fuse box in the cargo
compartment ................................. 324
Fuse box in the engine
compartment ................................. 324
Important safety notes .................. 323
see Fuses G
Garage door opener Clearing the memory ..................... 294
Important safety notes ..................291
Opening/closing the garage door ..293
Programming (button in the rear-
view mirror) ................................... 291
Gear or selector lever (cleaning
guidelines)
......................................... 308
Genuine ................................................ 22
Glove box ........................................... 271
GTW (Gross Trailer Weight)
(definition) ......................................... 350H
Handbrake see Parking brake
Hazard warning lamps ......................113
Headlamps Adding fluid to cleaning system .....303
Cleaning system (function) ............ 113
Cleaning system (notes) ................372
Fogging up ..................................... 115
see Automatic headlamp mode
Head restraints
Adjusting ......................................... 99
Adjusting (electrically) .....................99
Adjusting (manually) ........................ 99Adjusting (rear) ................................
99
Installing/removing (rear) .............. 100
see NECK-PRO head restraints/
NECK-PRO luxury head restraints
Heating
see Climate control
High-beam headlamps
Changing bulbs .............................. 118
Display message ............................ 241
Switching Adaptive Highbeam
Assist on/off ................................. 114
Switching on/off ........................... 113
Hill start assist .................................. 144
HOLD function Deactivating ................................... 180
Display message ............................ 247
Function/notes ............................. 179
Hood
Closing ........................................... 300
Display message ............................ 255
Important safety notes .................. 299
Opening ......................................... 300
Hydroplaning ..................................... 166 I
Ignition lock see Key positions
Immobilizer .......................................... 71
Indicator lamps see Warning and indicator lamps
Instrument cluster
Overview .......................................... 31
Settings ......................................... 226
Warning and indicator lamps ...........32
Instrument cluster lighting .............. 227
Interior lighting ................................. 115
Automatic control .......................... 116
Delayed switch-off (on-board
computer) ...................................... 228
Emergency lighting ........................ 116
Manual control ............................... 116
Overview ........................................ 115
Reading lamp ................................. 115
Setting the brightness of the
display/switch (on-board
computer) ...................................... 227 Index
11

H
Environmental note
Dispose of service products in an
environmentally responsible manner.
Service products include the following:
R Fuels (e.g. gasoline, diesel)
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
products that have been tested and approved
by Mercedes-Benz.
Information about tested and approved
products can be obtained from 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
inscription on the containers:
R MB-Freigabe (e.g. MB-Freigabe 229.51)
R MB Approval (e.g. MB Approval 229.51)
Other designations or recommendations
indicate a level of quality or a specification in
accordance with an MB Sheet number (e.g.
MB 229.5). They have not necessarily been
approved by Mercedes-Benz. Fuel
Important safety notes G
WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and
explosion. You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the
auxiliary
heating before
refueling. G
WARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that
fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
R Wash away fuel from skin immediately
using soap and water.
R If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
R If fuel is swallowed, seek medical
assistance without delay. Do not induce
vomiting.
R Immediately change out of clothing which
has come into contact with fuel.
Tank capacity Model Total
capacity GLK 250 BlueTEC
15.6 US gal
(59.0 l) All other models
17.4 US gal
(66.0 l) Model Of which
reserve All models
approx.
2.1 US gal (8.0 l)366
Service products and filling capacities
Technical data

approved R-1234yf PAG oil may not be
mixed with other conventional PAG oils.
Otherwise, the climate control
system
may
be damaged.
Service work, such as topping-up refrigerant
or replacing components, may only be carried
out at a qualified specialist workshop. All
applicable regulations, such as SAE
standards J639, J2842 and J2845 must be
adhered to.
Always have work on the climate control
system carried out at a qualified specialist
workshop.
Refrigerant instruction label Example: refrigerant instruction label
0043
Warning symbol
0044 Refrigerant filling capacity
0087 Applicable SAE standards
0085 PAG oil part number
0083 Type of refrigerant Warning symbols
0043 indicate:
R possible dangers
R the flammability of refrigerant (R-1234yf)
R that it is necessary to have maintenance
work carried out at a qualified specialist
workshop
Filling capacities All models Capacity
Refrigerant
660 ± 10 g
(23.3 ± 0.4 oz ) PAG oil
110 g
(3.9 oz) Vehicle data
General notes
Please note that for the specified vehicle
data:
R the heights specified may vary as a result
of:
-tires
- load
- condition of the suspension
- optional equipment
R the indicated ground clearance refers to
the vehicle when loaded and
ready to drive,
including:
- driver (68 kg)
- all fluids (fuel tank 100% full) Vehicle data
373
Technical data Z