Driving systems
Problem
Possible causes/consequences and
X
Solutions
·
DISTRONIC PLUS
or PRE-SAFE
®
Brake: The red
distance warning
lamp comes on
while driving and
an acoustic
warning sounds.
You are gaining too rapidly on the vehicle ahead of you or
DISTRONIC PLUS or PRE-SAFE
®
Brake has recognized a stationary
obstacle on your probable line of travel.
X
Apply the brakes immediately.
X
Carefully observe the traffic situation. You may need to brake
or maneuver to avoid hitting an obstacle.
Vehicle
Problem
Possible causes/consequences and
X
Solutions
The yellow fuel tank
reserve warning lamp in
the fuel gauge comes
on while driving.
The fuel level has gone below the reserve mark.
X
Refuel at the next gas station.
Engine
Problem
Possible causes/consequences and
X
Solutions
;
The yellow engine
malfunction indicator
lamp comes on when
the engine is running.
There may be a malfunction in
R
the fuel management system
R
the ignition system
R
the emission control system
R
systems which affect emissions
Such malfunctions may result in excessive emissions values and
may switch the engine to limp-home (emergency operation) mode.
X
Have the vehicle checked as soon as possible at an authorized
Mercedes-Benz Center.
i
Some states may by law require you to visit a workshop as
soon as the engine malfunction indicator lamp comes on. Check
local requirements.
;
The yellow engine
malfunction indicator
lamp comes on when
the engine is running.
A loss of pressure has been detected in the fuel system. The fuel
cap may not be closed properly or the fuel system may be leaky.
X
Check the fuel cap (
Y
page 366).
X
If it is not closed properly: Close the fuel cap.
X
If it is closed properly: Have the fuel system checked by an
authorized Mercedes-Benz Center.
What to do if …
457
Practical hints
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