Page 26 of 341

23 Contents - Operation
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Malfunction message
memory ...................................... 108
Individual settings ..........................110
Setting the audio volume ...............113
Flexible service system
(FSS) .............................................114
Engine oil level indicator ...............117
Engine oil consumption .................118
Exterior lamp switch ......................119
Night security illumination ......... 120
Headlamp cleaning system .......... 121
Combination switch ...................... 122
Hazard warning flasher
switch .......................................... 125
Automatic climate control ............ 126
Display and controls .................. 128
Basic setting ................................ 129
Special settings .......................... 129
Defogging windows .................... 129
Defrosting .................................... 129
Rear window defroster .............. 130Air distribution ...........................130
Air volume ...................................130
Air recirculation ......................... 131
Dust filter .....................................131
Activated charcoal filter ............132
Residual engine
heat utilization ............................132
Front center console
compartment ventilation ...........133
Rear passenger compartment
adjustable air outlet ...................134
Audio and telephone,
operation .....................................135
Power windows ...............................154
Sliding / pop-up roof ......................156
Interior lighting ..............................159
Entrance lamps, exit lamps
in doors .......................................159
Rear window sunshade .................160
Sun visors ........................................ 161Illuminated vanity mirrors ........... 161
Interior ............................................ 162
Armrest, rear bench ...................... 162
Cup holder in
rear bench armrest ................... 162
Glove box ......................................... 163
Cup holder and coin holder
in glove box lid ........................... 163
Storage compartment above
ashtray in center console ........ 164
Storage compartments
in center console ....................... 164
Cup holder in center console ....... 165
Ashtrays .......................................... 166
Lighter ............................................. 168
Cargo tie-down hooks .................... 169
Parcel net in
front passenger footwell .......... 169
Cellular telephone ......................... 170
Shelf below rear window .............. 170
Garage door opener ....................... 171
Page 30 of 341
27 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Obtaining replacement keys
Your vehicle is equipped with a theft deterrent locking
system requiring a special key manufacturing process.
For security reasons, replacement keys can only be
obtained from your authorized Mercedes-Benz Center.Start lock-out
Important!
Removing the electronic key from the steering lock
activates the start lock-out. The engine cannot be
started.
Inserting the electronic key in the steering lock
deactivates the start lock-out.
Note:
In case the engine cannot be started (vehicle’s battery is
in order), the system is not operational. Contact an
authorized Mercedes-Benz Center or call 1-800-FOR-
MERCedes (in the USA), or 1-800-387-0100 (in Canada).
Page 31 of 341
28 Central locking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
General notes on the central locking system
If the electronic key is inserted in the steering lock, the
vehicle cannot be locked or unlocked with the remote
control.
If the vehicle cannot be locked or unlocked:
•Aim transmitter eye at a receiver of either front door
handle. Check the batteries of the electronic main
key, see page 291 or to synchronize the remote
control, see page 293.
•Use the mechanical key to unlock the vehicle. To
start engine, insert the electronic key in the steering
lock. There could be a slight delay until the
electronic key can be turned in the steering lock.Important!
When unlocking the driver’s door with the mechanical
key, the exterior lamps will flash and the alarm will
sound.
To cancel the alarm, insert the electronic key in the
steering lock or press buttonŒ or‹ on the
electronic main key.
Page 56 of 341
53 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Rear seat head restraints
Folding head restraints backward (with engine
running):
Press symbol-side of rocker switch to release the head
restraints. The head restraints will then fold backward
for increased visibility.
Placing head restraints upright:
Pull head restraint forward until it locks in position.Angle of head restraints:
The head restraint angle can be adjusted manually.
Important!
For safety reasons, always drive with the rear head
restraints in the upright position when the rear seats
are occupied. Keep area around head restraints clear of
articles (e.g. clothing) to not obstruct the folding
operation of the head restraints.
P91.16-2018-26
Page 57 of 341

54 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Multicontour seat (optional)
We recommend to adjust the multicontour seat in the
following order:
1Seat cushion depth
2Backrest bottom
3Backrest center
4Side bolster adjustmentSome m od els may be eq uipped with m ulticontour sea ts.
These seats have movable seat cushions, and inflatable
air cushions built into the backrest to provide additional
lumbar and side support.
The seat cushion movement and amount of backrest
cushion height and curvature can be continuously
varied with regulators (1, 2 and 3) after turning the
electronic key in steering lock to position 2.
The side bolsters of the backrest can be adjusted with
rocker switch (4):
•press to the right – increase side support,
•press to the left – decrease side support.
If the engine is turned off, the last cushion setting is
retained in memory, and automatically adjusts the
cushion to this setting when the engine is restarted.
1
234
P91.25-2025-26
Page 90 of 341
87 Instrument cluster
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 1Push buttons for intensity of instrument lamps, see
page 89
2Push button for resetting trip odometer, see page 91,
or to acknowledge a malfunction warning message,
see page 108
3Coolant temperature gauge, see page 90
4Fuel gauge with reserve and fuel cap placement
warning lamp, see page 236
5Outside temperature indicator, see page 90
6Left turn signal indicator lamp, see combination
switch on page 122
7ESP warning lamp, see page 2378Speedometer
9Trip odometer, see page 91 and 96
10Main odometer, see page 96
11Multifunction indicator, see page 92,
or FSS indicator, see page 114,
or engine oil level indicator, see page 117
12Right turn signal indicator lamp, see combination
switch on page 122
13Tachometer, see page 91
14Gear range indicator display, see page 196
15Clock, see page 110
Page 91 of 341

88 Instrument cluster
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Indicator lamps in the instrument cluster
High beam
ABS malfunction, see page 237
Brake fluid low (except Canada).
Parking brake engaged, see page 202
Brake fluid low (Canada only).
Parking brake engaged, see page 202
BAS malfunction, see page 237
ESP malfunction, see page 237
Fasten seat belts, see page 60
ESP. Adjust driving to road condition,
see page , see page 237Engine malfunction indicator lamp. If the
“CHECK ENGINE” malfunction indicator
lamp comes on when the engine is running,
it indicates a malfunction of the fuel
management system, emission control
system, systems which impact emissions, or
the fuel cap is not closed tight. In all cases,
we recommend that you have the
malfunction checked as soon as possible, see
page 234
SRS malfunction, see page 236
Function indicator lamp on the center console
Front passenger airbag automatically
switched off, see page 238
ABSBRAKE
CHECK
ENGINESRS
Page 93 of 341

90 Instrument cluster
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Coolant temperature gauge (3)
During severe operating conditions and stop-and-go city
traffic, the coolant temperature may rise close to the red
marking.
The engine should not be operated with the coolant
temperature in the red zone. Doing so may cause
serious engine damage which is not covered by the
Mercedes-Benz Limited Warranty.Outside temperature indicator (5)
The temperature sensor is located in the front bumper
area. Due to its location, the sensor can be affected by
road or engine heat during idling or slow driving. This
means that the accuracy of the displayed temperature
can only be verified by comparison to a thermometer
placed next to the sensor, not by comparison to external
displays (e.g. bank signs etc.).
Adaption to ambient temperature takes place in steps
and depends on the prevailing driving conditions
(stop-and-go or moderate, constant driving) and amount
of temperature change.
Wa r n i n g !
• Driving when your engine is badly overheated
can cause some fluids which may have leaked
into the engine compartment to catch fire. You
could be seriously burned.• Steam from an overheated engine can cause
serious burns and can occur just by opening
the engine hood. Stay away from the engine if
you see or hear steam coming from it.Turn off the engine, get out of the vehicle and do
not stand near the vehicle until it cools down.
Wa r n i n g !
The outside temperature indicator is not designed
to serve as an Ice-Warning Device and is therefore
unsuitable for that purpose. Indicated
temperatures just above the freezing point do not
guarantee that the road surface is free of ice.