250 Controls in detail
Useful features
The cigarette lighter is located in the cen-
ter console compartment in front of the
center armrest (
page 30).
1Cigarette lighter
Switch on the ignition (page 38).
Push in cigarette lighter1.
The lighter will pop out automatically
when hot.
Power outlets
Power outlet in rear center console
1Power outlet
2Cover
Slide cover2 back.
!The lighter socket can be used to
accommodate 12V DC electrical accessories (up
to a maximum 85 W) designed for use with the
standard “cigarette lighter” plug type. Keep in
mind, however, that connecting accessories to
the lighter socket (for example extensive con-
necting and disconnecting, or using plugs that do
not fit properly) can damage the lighter socket.
With the socket damaged, the lighter may no
longer be able to be placed in the heating
(pushed-in) position, or the lighter may pop out
too early with the lighter not hot enough.
To help avoid damaging the cigarette lighter
socket, we recommend connecting 12V DC elec-
trical accessories designed for use with a stan-
dard “cigarette lighter” plug type to the 12V
power outlets (
page 250) in your vehicle
whenever possible.
!Make sure no fluids come into contact with
the power outlet, as this could cause a short cir-
cuit.
iMake sure the override switch is not activat-
ed (
page 87). The power outlet in the rear cen-
ter console will not function if the override
switch is activated.
356 Practical hints
What to do if …
Lamp in center console
ProblemPossible cause/consequenceSuggested solution
75
The indicator lamp illuminates and remains
illuminated with the weight of a typical adult
or someone larger than a small individual on
the front passenger seat.
The system is malfunctioning.Have the system checked as soon as
possible by an authorized
Mercedes-Benz Center.
Read and observe messages in the
multifunction display and follow cor-
rective steps (
page 358).
Warning!G
If the 75 indicator lamp
illuminates and remains illuminated with the
weight of a typical adult or someone larger
than a small individual on the front passen-
ger seat, do not have any passenger use the
front passenger seat until the system has
been repaired.
365 Practical hints
What to do if …
Display messagePossible cause/con-
sequencePossible solution
Monitor the 75 indicator lamp on the center console (page 29) and
the multifunction display in the instrument cluster (
page 27) for the following:
With the seat unoccupied and the ignition turned on,
the 75 indicator lamp on the center console should illuminate and
remain illuminated, indicating that the OCS (
page 71) has deactivated the
front passenger front air bag.
the message Front Passenger Airbag Enabled See Operator’s Manual or the
message
Front Passenger Airbag Disabled See Operator’s Manual should
not appear in the multifunction display at any time the seat is unoccupied. Wait
at least 60 seconds for the system to complete the necessary check cycles and
to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. De-
pending on the front passenger classification sensed by the OCS (
page 71), the
75 indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the sys-
tem checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!G
If the 75indicator lamp
remains out even after performing the above
corrective steps, do not have any children
12 years old and under and other smallindividuals use the front passenger seat un-
til the system has been repaired.
367 Practical hints
What to do if …
Display messagePossible cause/con-
sequencePossible solution
Monitor the 75 indicator lamp on the center console (page 29) and
the multifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,
the 75 indicator lamp on the center console should illuminate and
remain illuminated, indicating that the OCS (
page 71) has deactivated the
front passenger front air bag.
the message Front Passenger Airbag Enabled See Operator’s Manual or the
message
Front Passenger Airbag Disabled See Operator’s Manual should
not appear in the multifunction display at any time the seat is unoccupied. Wait
at least 60 seconds for the system to complete the necessary check cycles and
to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. De-
pending on the front passenger classification sensed by the OCS (
page 71), the
75 indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the sys-
tem checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!G
If the 75 indicator lamp
remains illuminated with an adult occupant
on the front passenger seat even after per-
forming the above corrective steps,do not have any passenger use the front
passenger seat until the system has been
repaired.
399 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 5.90 ft
(1.80 m) is required to open the trunk lid.
Insert the mechanical key into the
trunk lid lock until it stops.
Turn mechanical key1 counterclock-
wise to position3 and hold it in this po-
sition.
Pull handle2 and lift the trunk lid.The trunk opens.
Turn the mechanical key back and re-
move it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or SmartKey with
KEYLESS-GO*, do the following:
Close the passenger door, the rear
doors and the trunk.
Press the central locking switch in the
center console (
page 116).
Check to see whether the locking
knobs on the doors have moved down.
If necessary, push them down
manually.
Remove the mechanical key out of the
SmartKey (
page 398).
Check whether the trunk is locked.
If necessary, lock the trunk with the
mechanical key (
page 115).
Except for the driver’s door, the vehicle
should now be locked.
Insert mechanical key2 into the
driver’s door lock until it stops.
Turn the mechanical key clockwise to
position1.
The driver’s door is locked.
1Mechanical key
2Handle
3Unlocking in an emergency
!Always make sure there is sufficient over-
head clearance.
1Locking
2Mechanical key
iThis procedure does not arm the anti-theft
alarm system, nor does it lock the fuel filler flap.
459 Index
Center console
Lower part 30
PASS AIR BAG OFF indicator
lamp 356
Upper part 29
Central locking
Automatic 116
Locking/unlocking from inside 116
Switching on/off (control
system) 163
Central locking switch 116
Certification label 300
Checking tire pressure electronically with
the Advanced Tire Pressure Monitoring
System* (Advanced TPMS*), (Canada
only) 309
Checking tire pressure electronically with
the Tire Pressure Monitoring System
(TPMS), (USA only) 306
Children in the vehicle 82
Air bags 67
Infant and child restraint systems 82
LATCH-type child seat anchors 86
Override switch for rear passenger
compartment 87
Cigarette lighter 249Climate control system
Air conditioning refrigerant 450
Air conditioning, Cooling 201
Air distribution 195
Air recirculation mode 198
Air volume 196
Automatic mode 194
Control panel, Rear 202
Deactivating system 194
Front defroster 197
Maximum cooling MAX COOL 198
Rear climate control 202
Residual engine heat (REST) 201
Clock 27, 157
Setting time 157
Cockpit 24
Cold tire inflation pressure 324
Collapsible tire
Inflating 416
Collapsible wheel chock 397
COMAND see separate operating instruc-
tions
Combination filter with pollutant-sensitive
air-recirculation mode 200
Combination switch 55, 130Control system 139
Functions 143
Multifunction display 139
Multifunction steering wheel 140
Resetting to factory default 153
Control system menus 142, 143
AUDIO 148
Distronic* 151
NAV* 150
Settings 152
Standard display 145
TEL* 166
Trip computer 164
Vehicle status message memory 151
Control system submenus
Convenience 163
Instrument cluster 155
Lighting 159
Time/Date 157
Vehicle 162
Convenience submenu 163
Activating easy-entry/exit
feature* 163
471 Index
Service and warranty information 10
Service intervals see Maintenance, Service
indicator
Service life
Tires 294
Service see Maintenance
Service system see Maintenance
system 330
Service, Parts 432
Settings 106, 152
Control system menus and
submenus 141
Date 158
Individual, Vehicle 152
Memory function 124
Resetting all, Control system 153
Selective, SmartKey 102
Selective, SmartKey with
KEYLESS-GO* 107
Suspension tuning 230
Temperature (interior) 195
Time 157
Settings menu
Functions in 152
Submenus 153
Shelf below rear window, cleaning 340Shift program mode, Automatic
transmission 175
Shifting, Automatic transmission 169
Side impact air bags 70
Side marker lamps
Cleaning lenses 337
Side windows
Synchronizing power windows 207
Side windows see Power windows
Sidewall 325
Ski bag* (Canada only) 239
SmartKey see Key, SmartKey
SmartKey with KEYLESS-GO* see Key,
SmartKey with KEYLESS-GO*
Snow chains 329
Snow tires 328
Spare wheel 393, 445
Mounting 412
Speed settings
Cruise control 213
Distronic* 223
Speedometer 27
Selecting display mode 155
SRS 64
Indicator lamp 27, 353
Messages in display 388Standing lamps 126
Standing water, Driving through 279
Starter switch 38
Starter switch positions 38
Starting difficulties 52
Starting the engine
SmartKey 51
SmartKey with KEYLESS-GO* 52
Steering wheel 28
Adjustment 44
Buttons 28
Cleaning 340
Steering wheel gearshift control one-touch
gearshifting*
Automatic transmission 177
Stolen Vehicle Recovery services 262
Storage compartments 32, 243
Center armrest 243
Cup holder 246
Glove box 243
Parcel net in front passenger
footwell 245
Rear armrest 244
Rear center console 244
Ruffled storage bags 245
Under seat 244