Page 354 of 456
353 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
_
ENTRY POSITION
DO NOT DRIVE
Seat, exterior mirrors and steering wheel
have not yet moved to their preset driving
positions.
Wait until the seat, exterior mirrors and
steering wheel have moved to their driv-
ing positions.
The message will disappear.
Y
HOOD OPEN
You are driving with the hood open.
Close the hood (
page 274).
I
REMOVE KEY
You have forgotten to remove the
SmartKey.
Remove the SmartKey from the starter
switch.
REPLACE KEY
DRIVE TO WORKSHOP
The SmartKey is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
AUTOMATIC LIGHT ON
REMOVE KEY
SmartKey in starter switch position
1or2.
Remove the SmartKey from the starter
switch.
KEY
CHECK BATTERY
The battery in the SmartKey with
KEYLESS-GO* is discharged.
Replace the battery (
page 377).
KEY
NOT RECOGNIZED
SmartKey with KEYLESS-GO* is not rec-
ognized while the engine is running be-
cause
the SmartKey is not in the vehicle
there is strong radio-frequency inter-
ference
Stop the vehicle in a safe location as soon
as it is safe to do so.
Search for the SmartKey.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started again
after it has been stopped.
Page 355 of 456
354 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
F
KEY
NOT RECOGNIZED
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Operate the vehicle with the SmartKey in
the starter switch if necessary.
KEY
STILL IN VEHICLE
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.
Take the SmartKey with KEYLESS-GO*
out of the vehicle.
KEYLESS-GO
DRIVE TO WORKSHOP
The KEYLESS-GO* system is malfunction-
ing.
Visit an authorized Mercedes-Benz
Center as soon as possible.
.
3RD BRAKE LIGHT
CHECK LIGHT
The high mounted brake lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
STOP LAMP
VISIT WORKSHOP
Brake lamp illumination is delayed or
lamp is permanently on.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Page 356 of 456
355 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
.
BRAKE LIGHT LEFT
SUBSTITUTE LAMP ON
The left brake lamp is malfunctioning. A
substitute bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
BRAKE LIGHT RIGHT
SUBSTITUTE LAMP ON
The right brake lamp is malfunctioning. A
substitute bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
DISPLAY DEFECTIVE
VISIT WORKSHOP
The display for the lamps or the system is
malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
FRONT FOGLAMP, LEFT
CHECK LIGHT
The left front fog lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
FRONT FOGLAMP, RIGHT
CHECK LIGHT
The right front fog lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
HIGH BEAM, LEFT
CHECK LIGHT
The left high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
HIGH BEAM, RIGHT
CHECK LIGHT
The right high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
LICENSE PLATE L, L
CHECK LIGHT
The left license plate lamp is malfunction-
ing.
Replace the bulb as soon as possible.
LICENSE PLATE L, R
CHECK LIGHT
The right license plate lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Page 357 of 456
356 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
.
LIGHT SENSOR
DRIVE TO WORKSHOP
The lamp sensor is malfunctioning. The
headlamps switch on automatically.
In the control system, set lamp operation
to manual (
page 159).
Switch on headlamps using the exterior
lamp switch.
Visit an authorized Mercedes-Benz
Center as soon as possible.
LOW BEAM, LEFT
CHECK LIGHT
The left low beam lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
LOW BEAM, RIGHT
CHECK LIGHT
The right low beam lamp is malfunction-
ing.
Visit an authorized Mercedes-Benz
Center as soon as possible.
MARKER LIGHT, FL
CHECK LIGHT
The front left side marker lamp is mal-
functioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
MARKER LIGHT, FR
CHECK LIGHT
The front right side marker lamp is mal-
functioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Page 358 of 456
357 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
.
REAR FOGLIGHT
CHECK LIGHT
The rear fog lamp is malfunctioning.
Replace the bulb as soon as possible.
REVERSE LIGHT, LEFT
CHECK LIGHT
The left reverse lamp is malfunctioning.
Replace the bulb as soon as possible.
REVERSE LIGHT, RIGHT
CHECK LIGHT
The right reverse lamp is malfunctioning.
Replace the bulb as soon as possible.
STANDING LIGHT, L
CHECK LIGHT
The left front standing lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
STANDING LIGHT, R
CHECK LIGHT
The right front standing lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
STANDING LIGHT, L
SUBSTITUTE LAMP ON
The left rear standing lamp is malfunc-
tioning. A substitute bulb is being used.
Replace the bulb as soon as possible.
STANDING LIGHT, R
SUBSTITUTE LAMP ON
The right rear standing lamp is malfunc-
tioning. A substitute bulb is being used.
Replace the bulb as soon as possible.
TAIL LIGHT, LEFT
SUBSTITUTE LAMP ON
The left tail lamp is malfunctioning. A sub-
stitute bulb is being used.
Replace the bulb as soon as possible.
TAIL LIGHT, RIGHT
SUBSTITUTE LAMP ON
The right tail lamp is malfunctioning. A
substitute bulb is being used.
Replace the bulb as soon as possible.
Page 359 of 456
358 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
.
TURN OFF LIGHTS
You have removed the SmartKey from the
starter switch and opened the driver’s
door or removed the SmartKey with
KEYLESS-GO* from the vehicle and left
the headlamps on.
Turn the exterior lamp switch to M
(page 52).
FRONT TURN SIGNAL, L
CHECK LIGHT
The left front turn signal lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
FRONT TURN SIGNAL, R
CHECK LIGHT
The right front turn signal lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
REAR TURN SIGNAL, L
SUBSTITUTE LAMP ON
The left rear turn signal lamp is malfunc-
tioning. A substitute bulb is being used.
Replace the bulb as soon as possible.
REAR TURN SIGNAL, R
SUBSTITUTE LAMP ON
The right rear turn signal lamp is malfunc-
tioning. A substitute bulb is being used.
Replace the bulb as soon as possible.
MIRROR TURN SIG., L
CHECK LIGHT
The left turn signal in the side mirror is
malfunctioning. This message will only ap-
pear if all light emitting diodes have
stopped working.
Visit an authorized Mercedes-Benz
Center as soon as possible.
MIRROR TURN SIG., R
CHECK LIGHT
The right turn signal in the side mirror is
malfunctioning. This message will only ap-
pear if all light emitting diodes have
stopped working.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Page 376 of 456
375 Practical hints
Opening/closing in an emergency
Opening/closing in an emergency
Tilt/sliding sunroof
You can open or close the tilt/sliding sun-
roof manually should an electrical malfunc-
tion occur.
The tilt/sliding sunroof drive is located be-
hind the lens of the interior overhead light.
1Lens
Pry off lens1 using a flat blade screw-
driver (
page 370).
Switch on the ignition (
page 34).
Take the crank from the operator’s
manual pouch.
2Crank
Insert crank2 through hole.
Turn crank2 clockwise to:
slide sunroof closed
raise roof at the rear
Turn crank2 counterclockwise to:
slide sunroof open
lower roof at the rear
iTurn crank2 slowly and smoothly.
The tilt/sliding sunroof must be syn-
chronized after being operated manual-
ly (
page 204).
Page 378 of 456
377 Practical hints
Replacing SmartKey batteries
4Battery
5Contact spring
Remove the batteries4 in the direc-
tion of arrow.
Using a lint-free cloth, insert new
batteries4 under the contact
spring5 with the positive terminal (+)
side facing up.
Return battery compartment3
(page 376) into housing until it locks
into place.
Slide mechanical key1 (
page 372)
back into the SmartKey.
Check the operation of the SmartKey.
SmartKey with KEYLESS-GO*
Replacement battery: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
SmartKey with KEYLESS-GO
(page 372).
Remove battery compartment3 out
of the housing (
page 376).
1Battery
2Tilt battery up
3Mechanical key
Using mechanical key3, apply pres-
sure to position2.
Battery1 tilts up slightly.
Pull out battery1 in the direction of
arrow.
Using a lint-free cloth, insert new
battery1 with the plus (+) side facing
up.
Return battery compartment3
(page 376) into housing until it locks
into place.
Slide mechanical key1 (
page 376)
back into the SmartKey with
KEYLESS-GO.
Check the operation of KEYLESS-GO.
