Page 116 of 337

#
Replace the co ver in the front wheel ar ch.
High beam, standing/parking lights and day‐
time running lights #
Open the bonn et. #
Turn housing co ver1 anti-clockwise and
re mo veit. #
Pull out the bulb with soc ket2. #
Inse rtthe new bulb with soc ket2 and
engage it as far as it will go. #
Press on housing co ver1 and rotate itto
th eright totighten it. #
Close the bonn et.
Tu rn signal light #
Open the bonn et. #
Turn soc ket1 anti-clo ckwise and pull it out. #
Pull the bulb out of soc ket1. #
Inse rtthe new bulb into soc ket1. #
Inse rtsoc ket1 and turn it clo ckwise until it
engages. #
Close the bonn et. Re
placing rear bulbs Overview of
rear light source types Ve
hicles with standard tail lamp
1 Third brake light: LED
2 Licence plate lighting: LED
3 Rear fog light (driver's side): P 21 W
4 Reversing light: P 21 W
5 Brake light, tail light/parking lights: P 21 W
6 Turn signal light: P 21 W
Ve hicles with LED tail lamps
1 Third brake light: LED
2 Licence plate lighting: LED
3 Rear fog light (driver's side): LED
4 Reversing light: W 16 W
5 Brake light, tail light/parking lights: LED
6 Turn signal light: LED
Re placing light sou rces in the tail lamp
Re quirements
R The lighting sy stem is switched off.
R Standard tail lamp: yourequ ire a P 21 W
light source.
R LED tail lamp: yourequ ire a W 16W light
source.
Re moving the tail lamp
* NO
TEDama getothe paintwork during
ta il lamp remo val The paintwork may be damaged when
theta il
lamps are remo ved. The tail lamp ma y,for
ex ample, scratch the paintwork when it is
re mo ved. #
Remo vetheta il lamps carefull y. #
Mercedes-Benz recommends having the
ta il lamp light sources replaced at a
qu alified specialist workshop. Light and vision
11 3
Page 117 of 337

Please no
tethat you can change the bulb of the
re ve rsing light only in the case of an LED tail
lamp. #
Open theta ilgate.
% Yo
u will find a scr ewdriver in theve hicle tool
kit (/ page247). #
Unscr ewtwo side scre ws1. #
Push tail lamp 2outwards against bolts 3
as far as it will go. #
Press tail lamp 2off outwards and away
from bolts 3. #
Pull the connector off the bulb mount of tail
lamp 2.
Installing the tail lamp #
Push the connector into the bulb mount of tail
lamp 2. #
Push tail lamp 2onto bolts 3from the side
and press it against theve hicle. #
Tighten two side scr ews1.
St andard tail lamp #
Unscr ewthre e scr ews1 and remo vebulb
mount 2from theta il lamp. Bulb mount
3
Turn signal light
4 Brake light, tail light, parking light
5 Reversing light
6 Rear fog light (only on the driver's side) #
Remo vetheta il lamp. #
Gently turn the bulb anti-clockwise and take it
out of the soc ket. #
Push the new bulb into the soc ket and turn it
clo ckwise toscr ew it in. #
Insert bulb mount 2into theta il lamp and
tigh ten all thre e scr ews1. #
Installth eta il lamp.
LED tail lamp #
Remo vetheta il lamp. #
Unscr ewhousing co ver1 byturning it anti-
clo ckwise. #
Turn the soc ket anti-clo ckwise and pull it out. #
Pull the bulb out of the soc ket. #
Inse rtthe new bulb into the soc ket. #
Inse rtthe soc ket and rotate it clockwise to
tighten it. #
Press on housing co ver1 and rotate it
clockwise totighten it. #
Installth eta il lamp. 11 4
Light and vision
Page 304 of 337

Display messages
Possible causes/consequences and 0050 0050Solutions
003B
inoperative Refuel vehi-
cle *T
here is too little fuel in the fuel tank.The hot-water auxiliary heater
(s ta tionary hea ter) cannot be switched on. #
Refuel theve hicle.
003B
inoperative See Owner's
Man. *T
he hot-water auxiliary heater (stationary hea ter) is malfunctioning. #
When theve hicle is stationary on a le vel sur face and the engine
has cooled down, make up tofour attem ptsto switch on the hot-
wate r auxiliary heater (stationary hea ter), wa iting se veral
minutes between each attem pt (/ page 128).
If th e hot-wate r auxiliaryheater (stationary hea ter) does not switch
on: #
Consult a qualified specialist workshop. Lights
Display messages
Possible causes/consequences and 0050 0050Solutions
0049
Left dipped beam (exa m‐
ple) *T
he cor responding light source is defective.
Ha ve defective LED lights replaced at a qualified specialist work‐
shop. #
Obser vethe no tes on changing a bulb (/ page111). #
Replace the defective bulb at the front (/ page112) or rear
(/ page 113).
% Ve
hicles with LED lights on the trailer: if the cur rent falls below
th e minimum of 50 mA, a display message may appear even
th ough the trailer lights are working proper ly.
Adaptive Main-beam
Assist inoperative *A
daptive Highbeam Assist is malfunctioning. #
Switch high beam on/off manually. #
Consult a qualified specialist workshop.
Adaptive Main-beam
Assist currently unavaila-
ble See Owner's Manual *A
daptive Highbeam Assist is deactivated and temp orarily inopera‐
tive.
The following causes are possible:
R The windsc reen is dirty in the camera's field of vision.
R Visibility is impaired due toheavy rain, snow or fog. #
Clean the windscreen.
When the sy stem de tects that the camera is fully operational,
th e display will show the message Adaptive Main-beam Assist
available again
Ad aptive Highbeam Assist is operational again.
Active Light System inop-
erative *T
he active light function is faulty. #
Consult a qualified specialist workshop. Display messages and
warning and indicator lamps 301