Display messages
Possible causes/consequences and M Solutions
å
Idle Mode
The yellow ; Check Engine indicator lamp also lights up and three
short warning tones sound.
You cannot drive the vehicle at a speed exceeding 5 mph (8 km/h).
X
Add at least 1.5 US gal (5.5 l) of DEF (Y page 129).
The display message and the yellow ; Check Engine indicator
lamp only disappear when the vehicle is stationary, at the latest
after 20 seconds as soon as you switch on the ignition or start the
engine after refueling.
Check Diesel
Exhaust Fluid See
Operator's Manual
In addition, the yellow ; DEF indicator lamp lights up and a warning
tone sounds.
The DEF reducing agent is contaminated, diluted or is not compliant
with ISO 22241.
X
Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible.
å
XX starts remaining
The yellow ; Check Engine indicator lamp also lights up and three
short warning tones sound.
After the message appears for the first time, the remaining DEF supply
will last for approximately 1200 miles (1900 km). The engine can then
only be started another 16 times.
The number of remaining engine starts xx
(16 to 0) is shown in the
message every time the engine is started.
The DEF reducing agent is contaminated, diluted or is not compliant
with ISO 22241.
The exhaust gas aftertreatment is malfunctioning or an emission rel-
evant malfunction has occurred. This malfunction or defect can dam-
age the exhaust gas aftertreatment.
X
Visit a qualified specialist workshop immediately.
å
Idle Mode
The yellow ; DEF indicator lamp also lights up and three short
warning tones sound.
The vehicle cannot be driven at a speed exceeding 5 mph (8 km/h).
X
Visit a qualified specialist workshop immediately.
?
Coolant Stop, turn
engine off
The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads, the
coolant warning lamp may come on when the ignition is switched on
or the engine is restarted. Such loads can be, for example, driving in
mountainous terrain or driving with a trailer.
X
Run the engine for approximately 1 minute at idling speed.
X
Consult a qualified specialist workshop if the display message con-
tinues to be shown.
188
Display messages
On-board computer and displays
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