Display
messages 270 Display messages Possible cause/consequence Possible solution
B Top up coolant See
Owner's Manual The coolant level is too low. X
Top up the coolant, observing the warning
notes before doing so (Y page 223).
X Have the coolant system checked at a qualified
specialist workshop if the coolant needs top-
ping up more often than usual. . Left-hand Corner-
ing light
or
Right-hand Corner-
ing light The left-hand and/or right-hand cornering
lamp* is faulty. X
Replace the bulb (Y page 306).. Left-hand dipped
beam
or
Right-hand dipped
beam The right-hand or left-hand dipped-beam
headlamp is faulty. X
Halogen headlamp: replace the bulb
(Y page 306).
X Bi-xenon headlamp*: visit a qualified special-
ist workshop. . AUTO lights inop-
erative The light sensor is faulty. Constant head-
lamp mode is switched on. X
Switch the lights to manual control in the on-
board computer (Y page 132).
X Switch the lights on and off using the light
switch. . Trailer Left-hand
turn signal
or
Trailer Right-hand
turn signal There is a malfunction in the left- or right-
hand windowbag. X
Replace the bulb. Practical advi
ce
* optional
251_AKB; 5; 7, en-GB
wobuchh,
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Changing the bulbs
307
Front bulbs Bulb Type
1 Side lamp/park-
ing lamp W 5 W
2 Turn signal lamp PY 21 W
3 Additional turn
signal lamp
LEDs
35 4 Dipped-beam
headlamps
H7 55 W
36
or
D1S 35 W* 37 5 Main-beam
headlamps
36
/
Main-beam
spotlight* 38 H7 55 W
6 Front foglamps
with cornering
light function* H7 55 W Rear bulbs
Bulb Type
7 Third brake
lamp
LED
35 8 Brake lamp/tail
lamp/parking
lamp P 21 W
9 Turn signal lamp PY 21 W
a Reversing lamp P 21 W
b
Rear foglamp* P 21 W
c Licence plate
lamp C 5 W
Before changing bulbs
You can replace the following bulbs:
R
Dipped-beam headlamps (vehicles with
halogen headlamps)
R Main-beam headlamps (vehicles with halo-
gen headlamps) R
Side lamp and parking lamp
R Front foglamps with cornering light func-
tion*
R Turn signal lamp (front)
R Reversing lamp
R Brake lamp/tail lamp/parking lamp
R Rear fog lamp
R Turn signal lamp (rear)
R Licence plate lamp
Observe the following points:
R Use only the bulb types specified here.
R To prevent a short-circuit, switch off the
lights before changing a bulb.
R Only hold bulbs with a clean, lint-free cloth.
R Do not work with wet or greasy fingers.
R If the new bulb still does not light up, con-
sult a qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
35 These bulbs must be replaced at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
36 Vehicles with halogen headlamps.
37 Vehicles with xenon headlamps*: always have these bulbs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
38 Vehicles with bi-xenon headlamps* Practical advice
* optional
251_AKB; 5; 7, en-GB
wobuchh,
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