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Practical hints
What to do if ...?
Display symbol Display message
.
Reverse lamp, right
Side marker lamp
front left
Side marker lamp
front right
Tail lamp left
back-up lamp on
Tail lamp right
back-up lamp on
Turn off lamps
Turn signal,
front left
Turn signal,
front right
Turn signal,
left mirror
394
Possible cause/consequence
The right backup lamp is malfunctioning.
The front left side marker lamp is malfunc-
tioning.
The front right side marker lamp is mal-
functioning.
The left tail lamp is malfunctioning. A
back-up bulb is being used.
The right tail lamp is malfunctioning. A
back-up bulb is being used.
Lamps have been turned on although the
SmartKey in the starter switch is in posi-
tion 0.
The left front turn signal lamp is malfunc-
tioning.
The right front turn signal lamp is malfunc-
tioning.
The turn signal in the left exterior rear
view mirror is malfunctioning. This mes-
sage will only appear if all light emitting di-
odes have stopped working.
Possible solution
Replace the bulb as soon as possible.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Turn off the headlamps.
Replace the bulb as soon as possible.
Replace the bulb as soon as possible.
Have the LEDs replaced as soon as
possible.
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