Page 284 of 399

281 Contents - Instrument cluster display
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
Instrument cluster displayMalfunction and indicator 
lamps in the instrument 
cluster ......................................... 282
On-board diagnostic system ......... 283
Check engine malfunction 
indicator lamp............................. 283
Brake warning lamp .................. 284
Supplemental restraint 
system (SRS) indicator lamp .... 285
Fuel reserve warning................. 286
ABS malfunction indicator 
lamp.............................................. 287
Electronic stability program 
(ESP) — warning lamp ............... 288
Seat belt nonusage warning 
lamp ............................................288Malfunction and indicator 
lamp in the center console......  289
AIRBAG OFF indicator lamp ....  289
Malfunction and warning 
messages in the 
multifunction display ..............  290
DISPLAY DEFECTIVE................  291
BATTERY  / ALTERNATOR .......  292
ANTILOCK BRAKE SYSTEM ....  293
BRAKE ASSIST...........................  293
BRAKE PAD WEAR....................  294
BRAKE FLUID ............................  294
PARKING BRAKE .......................  295
SEAT BELT SYSTEM ..................  295
ELEC. STABIL. PROG.
(Electronic stability program)..  296
COOLANT (coolant level)..........  297COOLANT 
(coolant temperature) ................ 298
ENGINE OIL LEVEL ................... 299
LIGHTING SYSTEM .................... 300
LIGHT SENSOR........................... 302
DOOR............................................ 302
TRUNK OPEN ............................. 303
HOOD ........................................... 303
TELEPHONE – FUNCTION ....... 304
TELE AID ..................................... 304
WASHER FLUID.......................... 305
RESTRAINT SYSTEM ................. 306
KEY............................................... 306
FUEL RESERVE .......................... 307
UNDERVOLTAGE ........................ 307
STEERING WHEEL ADJUST. ..... 308 
     
        
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283 Malfunction and indicator lamps
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index On-board diagnostic system
Check engine malfunction indicator lamp
Engine 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 (check the 
fuel cap). If the “CHECK ENGINE” lamp is illuminated 
continuously and the vehicle is driving normally, you 
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. 
     
        
        Page 287 of 399
284 Malfunction and indicator lamps
Te ch n i c a 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 290 of 399

287 Malfunction and indicator lamps
Te ch n i c a 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. 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 296 of 399
293 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index ANTILOCK BRAKE SYSTEM
* C = Category, see page 290See page 272 for notes on the antilock brake system 
(ABS).1 The display or the system is malfunctioning
BRAKE ASSIST* C = Category, see page 290A 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 1 Line 2 C*
ABS SYSTEM VISIT WORKSHOP! 2
DISPLAY DEFECTIVE VISIT WORKSHOP!
1
2
Line 1 Line 2 C*
BRAKE ASSIST NOT AVAILABLE! 2
BRAKE ASSIST VISIT WORKSHOP! 2
DISPLAY DEFECTIVE VISIT WORKSHOP! 2 
     
        
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294 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
BRAKE PAD WEAR
* C = Category, see page 290When this message appears during braking, it indicates 
that the brake pads are worn down.
Have the brake system checked at your authorized 
Mercedes-Benz Center as soon as possible.BRAKE FLUID
* C = Category, see page 290 Line 1 Line 2 C*
BRAKE PAD WEAR VISIT WORKSHOP! 2Line 1 Line 2 C*
BRAKE FLUID VISIT WORKSHOP! 2Wa r n i n g !
Driving with this message displayed can result in 
an accident. Have your brake system checked 
immediately. 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 298 of 399
295 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index PA R K I N G  B R A K E
* C = Category, see page 290
SEAT BELT SYSTEM* C = Category, see page 290 Line 1 Line 2 C*
PARKING BRAKE ENGAGE BRAKE! 1
PARKING BRAKE RELEASE BRAKE! 1Line 1 Line 2 C*
SEAT BELT SYSTEM VISIT WORKSHOP! 1
PASSENGER SEAT BELT FASTEN SEAT BELT! 2
DRIVER SEAT BELT FASTEN SEAT BELT! 2 
     
        
        Page 303 of 399
300 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
LIGHTING SYSTEM
Line 1 Line 2 C*
LOW BEAM,L CHECK LAMP! 2
LOW BEAM,R CHECK LAMP! 2
DISPLAY DEFECTIVE VISIT WORKSHOP!
1
2
TURN SIGNAL, L CHECK LAMP! 2
TURN SIGNAL, R CHECK LAMP! 2
L. TURN SIG. RFLECTR CHECK LAMP! 2
R. TURN SIG. RFLECTR CHECK LAMP! 2
TURN SIGNAL F, L CHECK LAMP! 2
TURN SIGNAL F, R CHECK LAMP! 2
BRAKE LIGHT
2
VISIT WORKSHOP! 2
BRAKE LIGHT, L
3
CHECK LAMP! 2
BRAKE LIGHT, R
3
CHECK LAMP! 2
3RD STOP LAMP
3
CHECK LAMP! 2
HIGH BEAM, L CHECK LAMP! 2
HIGH BEAM, R CHECK LAMP! 2
LICENSE PLATE L, L CHECK LAMP! 2
LICENSE PLATE L, R CHECK LAMP! 2
LIGHTS SWITCH OFF LIGHTS! 1
AUTOM. LIGHT ON REMOVE KEY! 1
FRONT FOGLAMP, L CHECK LAMP! 2
FRONT FOGLAMP, R CHECK LAMP! 2
REAR FOGLAMP CHECK LAMP! 2 Line 1 Line 2 C*