Page 279 of 421

276 Driving systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
ESP control switch
ESP control switch located on center console.
1Press to switch ESP off
ESP warning lampv, located in speedometer
dial, comes on.
2Press to switch ESP on
ESP warning lampv, located in speedometer
dial, goes out.To improve the vehicle’s traction when driving with
snow chains, or starting off in deep snow, sand or gravel,
switch off ESP by pressing the upper half (1) of the ESP
switch. The ESP warning lampv, located in the
speedometer dial, is continuously illuminated.
With the ESP system switched off, the engine torque
reduction feature is cancelled. Therefore, the enhanced
vehicle stability offered by ESP is unavailable.
Adapt your speed and driving to the prevailing road
conditions.
A portion of the ESP system remains active, even with
the switch in the OFF position.
If one drive wheel loses traction and begins to spin, the
brake is applied until the wheel regains sufficient
traction. The traction control engages at vehicle speeds
up to approximately 24 mph (40 km / h), and switches
off at 50 mph (80 km / h).
Wa r n i n g !
When the ESP warning lamp is illuminated
continuously, the ESP is switched off. Adapt your speed and driving to the prevailing road
conditions.
Page 288 of 421

285 Parking system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Parking assist (Parktronic)
The Parktronic system assists the driver during parking
maneuvers. It visually and audibly indicates the relative
distance between the vehicle and an obstacle.
The front area of the vehicle is monitored when driving
forward. When reversing or with the gear selector lever
in position “N”, the front as well as the rear areas are
monitored.
With the electronic key in starter switch position 2,
Parktronic engages automatically at speeds up to
approximately 10 mph (15 km / h) and deactivates
during higher speeds.
Parktronic can be switched off by a control switch
located in the center console. It engages automatically
again when starting the engine.
See page 289 for Parktronic switch.
Wa r n i n g !
Parktronic is a supplemental system. It is not
intended to nor does it replace the need for extreme
care. The responsibility during parking and other
critical maneuvers rests always with the driver.Special attention must be paid to objects having
smooth surfaces or low silhouettes (e.g. trailer
couplings, painted posts, or street curbs). Such
objects may not be detected by the system and can
damage the vehicle.The operational function of the Parktronic can be
affected by dirty sensors, especially at times of
snow and ice. See page 378 for notes on cleaning
the parktronic system sensors.Interference caused by other ultrasonic signals
(e.g. working jackhammers or the air brakes of
trucks) can cause the system to send erratic
indications, and should be taken into
consideration.
Page 296 of 421
293 Check regularly and before a long trip
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Check regularly and before a long trip 1Windshield washer and
headlamp cleaning system
For refilling reservoir see page 337.
2Coolant level,
see “Adding coolant” on page 336
3Engine oil level,
see “Engine oil level checking” on page 154 and 334
4Brake fluid,
see “Brake fluid” on page 396
Opening hood, see page 331.
Ve h i c l e l i g h t i n g : Check function and cleanliness. For
replacement of light bulbs, see “Exterior lamps” on
page 356.
Exterior lamp switch, see page 156.
Page 298 of 421

295 Contents - Instrument cluster display
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Instrument cluster displayMalfunction and indicator
lamps in the
instrument cluster ....................296
On-board diagnostic system .....296
Check engine malfunction
indicator lamp .............................296
Brake warning lamp ..................298
Supplemental restraint
system (SRS)
indicator lamp .............................299
Fuel reserve warning .................299
ABS malfunction
indicator lamp .............................300
Electronic stability
program (ESP) —
warning lamp ..............................301
Distronic (DTR) –
warning lamp ..............................301
Seat belt nonusage
warning lamp ..............................302Malfunction and
indicator lamp in the
center console ........................... 302
AIRBAG OFF indicator lamp .... 302
Malfunction and
warning messages in the
multifunction display .............. 303
DISPLAY DEFECTIVE ................ 304
BATTERY/ALTERNATOR .......... 305
ENTRANCE POSITION .............. 306
BRAKE ASSIST ........................... 306
BRAKE LINING WEAR .............. 307
BRAKE FLUID ............................ 307
PARKING BRAKE ....................... 308
TRUNK OPEN ............................. 308
ELEC. STABIL. PROG.
(Electronic stability
program) ..................................... 309
COOLANT (coolant level) .......... 310
COOLANT
(coolant temperature) ................ 311LIGHTING SYSTEM .................... 312
LIGHT SENSOR ........................... 314
ACTIV E BO DY CO NTROL
(ABC) ............................................ 314
TIRE PRESSURE ......................... 316
ENGINE OIL LEVEL ................... 318
CRUISE CONTROL ..................... 319
KEY ............................................... 319
DOOR ...........................................320
HOOD ...........................................320
TELE AID .....................................321
OIL TEMP.
(engine oil temperature) ...........321
CHIP-CARD (KEYLESS-GO) ......322
SELECTOR LEVER ......................323
TELEPHONE – FUNCTION .......323
WASHER FLUID .........................324
AIR SPRING (AirMatic) .............325
DISTRONIC (DTR) ......................326
Page 300 of 421

297 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index may still drive the vehicle, however, in all cases, we
recommend that you have the system checked at your
authorized Mercedes-Benz Center as soon as possible.
If the “CHECK ENGINE” lamp comes on continuously
and / or the vehicle is not driving normally (e.g.
malfunction of the fuel management system or running
out of fuel), serious damage can occur to the emission
system. Please contact your authorized Mercedes-Benz
Center immediately.
The Sequential Multiport Fuel Injection (SFI) control
module monitors emission control components that
either provide input signals to or receive output signals
from the control module. Malfunctions resulting from
interruptions or failure of any of these components are
indicated by the “CHECK ENGINE” malfunction
indicator lamp in the instrument cluster and are
simultaneously stored in the SFI control module.
If the “CHECK ENGINE” malfunction indicator lamp
comes on, have the system checked at your authorized
Mercedes-Benz Center as soon as possible.
With some exceptions, the control module switches off
the “CHECK ENGINE” malfunction indicator lamp if the
condition, causing the lamp to come on, no longer exists
during three consecutive cycles.An on-board diagnostic connector is located in the
passenger compartment near to the parking brake
pedal, allowing the accurate identification of system
malfunctions through the readout of diagnostic trouble
codes.
Notes:
When running out of fuel, the “CHECK ENGINE”
malfunction indicator lamp comes on and the engine
possibly switches to its limp-home (emergency
operation) mode.
To cancel the limp-home mode, the engine may have to
be started three or four times after refueling. The
malfunction indicator lamp remains illuminated. Have
the system checked at your authorized Mercedes-Benz
Center immediately.
Page 301 of 421
298 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Brake warning lamp
Except Canada
Canada only
When the brake warning lamp and message appear
while the engine is running, this means:
•there is insufficient brake fluid in the reservoir
(engine running and parking brake released), or
•the parking brake is set (engine running).Note:
If you find that the minimum mark on the brake fluid
reservoir is reached, have the brake system checked for
brake pad thickness and leaks.
Wa r n i n g !
Driving with the brake warning lamp illuminated
can result in an accident. Have your brake system
checked immediately if the brake warning lamp
stays on. Don’t add brake fluid before checking the
brake system. Overfilling the brake fluid reservoir
can result in spilling brake fluid on hot engine
parts and the brake fluid catching fire. You can be
seriously burned.
Page 303 of 421

300 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
ABS malfunction indicator lamp
The ABS malfunction indicator lamp in the
instrument cluster comes on with the
electronic key in starter switch position 2
and should go out with the engine running.
When the ABS malfunction indicator lamp symbol and
warning in the instrument cluster remains illuminated
while the engine is running, it indicates that the ABS
has detected a malfunction and has switched off. In this
case, the brake system functions in the usual manner,
but without antilock assistance.
A malfunctioning ABS control unit can possibly affect
the operation of other systems (e.g. Parktronic,
Navigation, Automatic transmission). Be guided
accordingly with respect to the use of those systems and
have the system checked at your authorized
Mercedes-Benz Center as soon as possible.With the ABS malfunctioning, the BAS and ESP are also
switched off. The malfunction indicator lamps and
malfunction messages in the multifunction display
come on with the engine running.
If the charging voltage falls below 10 volts, the
malfunction indicator lamp comes on and the ABS is
switched off. When the voltage is above this value again,
the malfunction indicator lamp should go out and the
ABS is operational.
Have the system checked at your authorized
Mercedes-Benz Center as soon as possible.
See page 272 for notes on antilock brake system (ABS).
ABS
Page 309 of 421
306 Malfunction and warning messages
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
ENTRANCE POSITION
* C = Category, see page 303Wait until the seat and steering wheel have moved to
their driving positions. The display will clear when they
have done so.
See also page 66 for easy-entry / exit feature.BRAKE ASSIST
* C = Category, see page 303A malfunction has been detected in the system. The
brake system functions in the usual manner, but
without brake assist system (BAS).
See page 271 for notes on the brake assist system (BAS).
Line 1Line 2C*
ENTRANCE POSITION DO NOT DRIVE! 1
Line 1Line 2C*
BRAKE ASSIST VISIT WORKSHOP! 2