Page 357 of 458

355 Practical hints
What to do if …?
Display 
Possible cause
Possible solution
. 
TURN OFF LIGHTS
Lamps have been turned on although the 
SmartKey in the ignition is in position 0.
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 Cen-
ter 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 Cen-
ter as soon as possible. 
     
        
        Page 375 of 458
373 Practical hints
Replacing bulbs
Replacing bulbs
Safe vehicle operation depends on proper 
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies are in good working order at all 
times.
Correct headlamp adjustment is extremely 
important. Have headlamps checked and 
readjusted at regular intervals and when a 
bulb has been replaced. See your autho-
rized Mercedes-Benz Center for headlamp 
adjustment.
iIf the headlamps or front fog lamps are 
fogged up on the inside as a result of 
high humidity, driving the vehicle a dis-
tance with the lights on should clear up 
the fogging.
iSubstitute bulbs will be brought into 
use when the following lamps malfunc-
tion:
Brake lamps
Rear parking lamps
Rear turn signal lamps
Tail lamps
Observe the messages in the multi-
function display (
page 351). 
     
        
        Page 376 of 458
374 Practical hintsReplacing bulbsBulbs Front lamps Rear lamps
Lamp
Type
1
Additional turn sig-
nal lamp
LED
2
Turn signal lamp
1156 NA
3
High beam flasher
H7-55 W
4
Side marker lamp
W5W
5
Fog lamp
HB4-55 W
6
Parking and stand-
ing lamp
W5W
7
Low beam and high 
beam lamp
Xenon
1 
D2S-35 W
1Bi-Xenon headlamps: For safety reasons (high volt-
age), do not replace the Xenon bulb yourself. See
your authorized Mercedes-Benz Center. 
Lamp
Type
8
High mounted brake 
lamp
LED
9
Brake lamp
LED
a
Tail, parking and 
standing lamp
P 21/4 W
Side marker lamp
LED
b
Backup lamp
P21W
c
License plate lamp
C5W
d
Rear fog lamp, 
driver’s side
P 21/4 W 
e
Turn signal lamp
PY 21 W 
     
        
        Page 377 of 458

375 Practical hints
Replacing bulbs
Notes on bulb replacement
Only use 12 volt bulbs of the same type 
and with the specified watt rating. 
Switch lights off before changing a bulb 
to prevent short circuits. 
Always use a clean lint-free cloth when 
handling bulbs. 
Your hands should be dry and free of oil 
and grease.
If the newly installed bulb does not 
come on, visit an authorized 
Mercedes-Benz Center.Have the LEDs and bulbs for the following 
lamps replaced by an authorized 
Mercedes-Benz Center.
Additional turn signal lamps in the exte-
rior rear view mirrors
Bi-Xenon lamps
High mounted brake lamp
Brake lamps
Rear side marker lamps
Rear parking lamps
Warning!
G
Keep bulbs out of reach of children.
Bulbs and bulb sockets can get very hot. Al-
low the lamp to cool down before changing 
a bulb.
Halogen lamps contain pressurized gas. A 
bulb can explode if you
touch or move it when hot
drop the bulb
scratch the bulb
Wear eye and hand protection.
Because of high voltage in Xenon lamps, it is 
dangerous to replace the bulb or repair the 
lamp and its components. We recommend 
that you have such work done by a qualified 
technician.
iHave the headlamp adjustment 
checked regularly. 
     
        
        Page 378 of 458
376 Practical hintsReplacing bulbsReplacing bulbs for front lamps 
Before you start to replace a bulb for a 
front lamp, do the following first:
Turn the exterior lamp switch to M 
(page 52).
Open the hood (
page 273) (except 
for side marker lamps).
1Housing cover for high beam flasher 
bulb, parking and standing lamp2Electrical connector for high beam 
flasher housing bulb
3Bulb socket for parking and standing 
lamp
4Bulb socket for turn signal lamp
5Housing cover for Bi-Xenon headlampBi-Xenon headlamp
Warning!
G
Do not remove the cover for the Bi-Xenon 
headlamp. Because of high voltage in Xenon 
lamps, it is dangerous to replace the bulb or 
repair the lamp and its components. We rec-
om men d t ha t  y ou  ha ve  s uc h w o rk do n e by  a  
qualified technician. 
     
        
        Page 379 of 458

377 Practical hints
Replacing bulbs
High beam flasher bulb
Press ends of housing cover1 tab to-
gether and remove cover.
Press connector2 downward.
Remove connector2 with the bulb.
Insert the new bulb so that the base lo-
cates in the recess on the holder.
From below, press connector2 with 
bulb upward onto the reflector.
Align housing cover1 and click into 
place.
Front turn signal bulb
Turn bulb socket4 counterclockwise 
and pull out.
Gently push bulb into bulb socket4, 
turn counterclockwise and remove.
Insert new bulb in bulb socket4, push 
in and twist clockwise.
Reinsert bulb socket4 in lamp and 
twist clockwise.Parking and standing lamp bulb
Press ends of housing cover1 tab to-
gether and remove cover.
Pull out the bulb socket3 with the 
bulb.
Pull the bulb out of the bulb socket3.
Insert a new bulb in the socket3.
Reinstall the bulb socket3.
Align housing cover1 and click into 
place.
Side marker lamp bulb
Carefully slide lamp towards rear.
Remove front end first.
Twist bulb socket counterclockwise 
and pull out.
Pull bulb out of the bulb socket.
Insert new bulb in socket.
Reinstall bulb socket, push in and twist 
clockwise.
To reinstall lamp, set rear end in 
bumper and let front end snap into 
place.
Replacing bulbs for rear lamps
Before you start to replace a bulb for a 
front lamp, do the following first:
Turn the exterior lamp switch to M 
(page 52).
Open the trunk (
page 101). 
     
        
        Page 380 of 458
378 Practical hintsReplacing bulbsTail lamp assemblies
1Black socket:
Backup lamp
2White socket:
Turn signal lamp
3Red socket:
Tail, standing and parking lamp
4Red socket:
Driver’s side: tail, parking and rear fog 
lamp
Passenger’s side: tail and parking lamp
Turn lock counterclockwise and move 
the trim to the side.
Turn bulb socket counterclockwise and 
pull out.
Gently twist bulb counterclockwise and 
pull out of bulb holder. 
Insert new bulb into the holder and turn 
it clockwise.
Reinstall bulb socket. 
The bulb socket should audibly click.
Replace trim and secure with lock. License plate lamp
1Screws
Loosen both screws1.
Remove the license plate lamp.
Replace the bulb.
Reinstall the license plate lamp.
Retighten screws1. 
     
        
        Page 430 of 458

428 IndexBattery, SmartKey with KEYLESS-GO*
Check lamp 99
Checking the battery 99
Replacing 372
Battery, vehicle 281, 386
Charging 387
Disconnecting 387
Reconnecting 388
Reinstalling 387
Removing 387
Bead 309
Bi-Xenon headlamps 419
Block heater (Canada only) 314
Blocking
Rear window operation 78
Brake assist system (BAS) 419
Brake fluid 271, 414
Brake lamp bulbs 374
Brake lamp, high mounted 374Brake pads
Message in display 343
Brakes 260
High-performance brake system (CL 65 
AMG only) 261
Warning lamp 327
Break-in period 258
Bulbs, replacing 373
Additional turn signals 374
Backup lamps 374
Brake lamps 374
Fog lamps 374
Front lamps 374
High beam 374
High mounted brake lamp 374
License plate lamps 374, 378
Low beam 374
Parking lamps 374, 377
Rear fog lamp 374, 377, 378
Side marker lamps 374, 377
Standing lamps 374, 377
Tail lamp assemblies 374, 378
Turn signal lamps 374C
CAC (Customer Assistance Center) 419
Calling up
Distronic* settings 149
Maintenance service indicator 316
Range (distance to empty) 151
CAN system 420
Canceling
Cruise control 206
Cargo tie-down hooks 230
Catalytic converter 268
CD changer* 144
CD mode 144
CD operation
Selecting tracks 143
Center console 27
Air bag off indicator lamp 334
Front passenger front air bag off indica-
tor lamp 334
Lower part 28
Upper part 27
Centigrade (°C)
Setting temperature units 156