Page 8 of 417

Contents
Practical hints.................................  289
What to do if … ..................................  290
Lamps in instrument cluster ........  290
Lamp in center console................  297
Vehicle status messages in the 
multifunction display ....................  298
Where will I find...? ............................  323
First aid kit ...................................  323
Vehicle tool kit .............................  323
Vehicle jack..................................  324
CD changer ..................................  324
Spare wheel .................................  325
Unlocking/locking in an emergency ..  327
Unlocking the vehicle ...................  327
Locking the vehicle ......................  328
Fuel filler flap ...............................  328
Manually unlocking the 
transmission gear selector lever ..  329Opening/closing in an emergency ..... 330
Tilt/sliding sunroof ....................... 330
Brush guard* ...................................... 331
Lowering and raising brush guard . 332
Replacing SmartKey batteries ............ 333
SmartKey ...................................... 334
Replacing bulbs .................................. 335
Bulbs ............................................. 336
Replacing bulbs for front lamps .... 338
Replacing bulbs for rear lamps ..... 343
Replacing wiper blades....................... 346
Removing wiper blades ................. 346
Installing wiper blades .................. 347
Flat tire ............................................... 348
Preparing the vehicle .................... 348
Mounting the spare wheel ............ 349
Battery................................................ 353
Charging the battery ..................... 353
Disconnecting the battery............. 354
Reconnecting the battery.............. 355Jump starting......................................  356
Towing the vehicle..............................  358
Transporting the vehicle ...............  360
Towing the vehicle - various 
problem scenarios ........................ 360
Front towing eye ...........................  361
Rear towing eye ............................ 361
Freeing a stranded vehicle ............ 361
Fuses.................................................. 362
Fuse box in passenger 
compartment ................................  362
Fuse box in battery box ................ 362
Fuse box in front passenger 
footwell ......................................... 363
Fuse box in middle tunnel .............  364 
     
        
        Page 242 of 417

241 Operation
At the gas station
G55AMG
1Coolant
2Brake fluidCoolant
For normal replenishing, use water (pota-
ble water quality). For more information, 
see “Coolant level” (
page 248) and see 
“Fuels, coolants, lubricants, etc.” 
(
page 376).
Brake fluidEngine oil level
For more information on engine oil, see 
“Engine oil” (
page 243).
Tire inflation pressure
For more information, see “Checking tire 
inflation pressure” (
page 261).
Vehicle lighting
Check function and cleanliness. For infor-
mation on replacing light bulbs, see “Re-
placing bulbs” (
page 335).
For more information, see “Exterior lamp 
switch” (
page 110).
Windshield/rear window washer sys-
tem and headlamp cleaning system
For more information on refilling the reser-
voir, see “Windshield/rear window washer 
system and headlamp cleaning system” 
(
page 249).
i
Opening the hood, see (page 242).
!
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. Noti-
fy an authorized Mercedes-Benz Light 
Truck Center immediately. Do not add 
brake fluid as this will not solve the 
problem. For more information, see 
“Practical hints” (
page 292). 
     
        
        Page 290 of 417
289 Practical hints
What to do if …
Where will I find...?
Unlocking/locking in an emergency
Opening/closing in an emergency
Brush guard*
Replacing SmartKey batteries
Replacing bulbs
Replacing wiper blades
Flat tire
Battery
Jump starting
Towing the vehicle
Fuses 
     
        
        Page 291 of 417

290 Practical hints
What to do if …
Lamps in instrument clusterGeneral information:
If any of the following lamps in the instru-
ment cluster fails to come on during thebulb self-check when switching on ignition, 
have the respective bulb checked and re-
placed if necessary.
ProblemPossible causeSuggested solution
-The yellow ABS indicator lamp 
comes on while driving.You engaged the differential locks. The ABS, 
ESP, BAS, EBB and 4-ETS are switched off. The driving systems will switch on 
again after the differential locks have 
been disengaged. 
The ABS has detected a malfunction and has 
switched off. The ESP, BAS, EBB and 4-ETS 
are also switched off (see messages in dis-
play).
If the ABS control unit is malfunctioning, oth-
er systems such as the navigation system or 
Rear Parking Assist* may also malfunction. 
The brake system is still functioning normally 
but without the ABS available.Continue driving with added caution. 
Wheels will lock during hard braking 
reducing steering capability.
Read and observe messages in the 
multifunction display (
page 300).
Have the system checked at an autho-
rized Mercedes-Benz Light Truck 
Center as soon as possible.
Failure to follow these instructions in-
creases the risk of an accident. 
     
        
        Page 316 of 417

315 Practical hints
What to do if …
Display symbolDisplay messagePossible causePossible solution
. BRAKE LIGHT, R
CHECK LIGHT!
 
The right brake lamp is malfunctioning.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.
FRONT FOGLIGHT, L
CHECK LIGHT!
 
The left front fog lamp is malfunctioning.Replace the bulb as soon as possible.
FRONT FOGLIGHT, R
CHECK LIGHT!
 
The right front fog lamp is malfunctioning.Replace the bulb as soon as possible.
FR. L. PARK. LAMP
CHECK LIGHT!
 
BACK-UP LIGHT ON! 
The left parking lamps are malfunction-
ing. A backup bulb is being used.Replace the bulb as soon as possible.
FR. R. PARK LAMP
CHECK LIGHT!
BACK-UP LIGHT ON!The right parking lamps are malfunction-
ing. A backup bulb is being used.Replace the bulb as soon as possible.
HIGH BEAM, L
CHECK LIGHT!
 
The left high beam lamp is malfunction-
ing.Replace the bulb as soon as possible.
HIGH BEAM, R
CHECK LIGHT!
 
The right high beam lamp is malfunction-
ing.Replace the bulb as soon as possible. 
     
        
        Page 317 of 417

316 Practical hints
What to do if …
Display symbolDisplay messagePossible causePossible solution
. LIGHT SENSOR
DRIVE TO WORKSHOP!The lamp sensor is malfunctioning. The 
headlamps switch on automatically.In the control system, set lamp opera-
tion to manual (
page 138).
Switch on headlamps using the 
exterior lamp switch (
page 110).
Visit an authorized Mercedes-Benz 
Light Truck Center as soon as possi-
ble.
LICENSE PLATE LIGHT, L
CHECK LIGHT!
 
The left license plate lamp is malfunction-
ing.Replace the bulb as soon as possible.
LICENSE PLATE LIGHT R
CHECK LIGHT!
 
The right license plate lamp is malfunc-
tioning.Replace the bulb as soon as possible.
LIGHTS
TURN OFF LIGHTS!The display appears if the driver’s door is 
opened with the engine shut off and no 
SmartKey in the starter switch.Insert SmartKey in the starter switch.
Switch off the lights (page 110).
LOW BEAM, L
CHECK LIGHT!The left low beam lamp is malfunctioning.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.
LOW BEAM, R
CHECK LIGHT!The right low beam lamp is malfunction-
ing.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible. 
     
        
        Page 318 of 417

317 Practical hints
What to do if …
Display symbolDisplay messagePossible causePossible solution
. MARKER LIGHT, FL
CHECK LIGHT!
 
The left front side marker lamp is mal-
functioning.Replace the bulb as soon as possible.
MARKER LIGHT, FR
CHECK LIGHT!
 
The right front side marker lamp is mal-
functioning.Replace the bulb as soon as possible.
REAR FOGLIGHT
CHECK LIGHT!
 
The rear fog lamp is malfunctioning. Replace the bulb as soon as possible.
REAR FOGLIGHT
TURN OFF
 
BACK-UP LIGHT ON!
A lamp is malfunctioning. A backup bulb 
is being used.Turn the rear fog lamp off.
REVERSE LIGHT, R
CHECK LIGHT!
 
The right backup lamp is malfunctioning.Replace the bulb as soon as possible.
TAIL LIGHT, L
CHECK LIGHT!
 
BACK-UP LIGHT ON! 
The left tail lamp is malfunctioning. 
A backup bulb is being used.Replace the bulb as soon as possible.
TAIL LIGHT, R
CHECK LIGHT!
 
BACK-UP LIGHT ON! 
The right tail lamp is malfunctioning. 
A backup bulb is being used.Replace the bulb as soon as possible.
TURN SIG., LF
CHECK LIGHT!
BACK-UP LIGHT ON!The left front turn signal lamp is malfunc-
tioning. A backup bulb is being used.Replace the bulb as soon as possible. 
     
        
        Page 319 of 417

318 Practical hints
What to do if …
Display symbolDisplay messagePossible causePossible solution
. TURN SIG., RF
CHECK LIGHT
!
BACK-UP LIGHT ON!
The right front turn signal lamp is mal-
functioning. A backup bulb is being 
used.Replace the bulb as soon as 
possible.
TURN SIG., LR
CHECK LIGHT
!
BACK-UP LIGHT ON!
The left rear turn signal lamp is malfunc-
tioning. A backup bulb is being used.Replace the bulb as soon as 
possible.
TURN SIG., RR
CHECK LIGHT!
BACK-UP LIGHT ON!The right rear turn signal lamp is mal-
functioning. A backup bulb is being 
used.Replace the bulb as soon as 
possible.
VISIT WORKSHOP!
DISPLAY MALFUNCTIONThe display for the lamps or the system 
is malfunctioning.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.
TURN SIG. MIRROR, L
CHECK LIGHT!The left turn signal in the side mirror is 
malfunctioning. This message will only 
appear if all light emitting diodes have 
stopped working.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.
TURN SIG. MIRROR, R
CHECK LIGHT!The right turn signal in the side mirror is 
malfunctioning. This message will only 
appear if all light emitting diodes have 
stopped working.Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.