Mercedes-Benz GL-Class 2013 Owners Manual - Manual (Page 308)

Display messages Possible causes/consequences and M Solutions
Ø
Check Additive See
Operator's Manual
The DEF tank is almost empty.
X Have the DEF tank filled as soon as possible at a qualified
specialist workshop (
Y
page 181).
Ø
Remaining Starts:
16
The DEF level has fallen to a minimum. You can start the engine a
further 16 times.
X
Have the DEF tank filled immediately at a qualified specialist
workshop (
Y
page 181).
i You can start the engine a further 16 times. If DEF is not added,
it will then not be possible to restart the engine. Refill the DEF
tank with approximately 1 gal (3.8 l) DEF (
Y
page 181).
Driving systems
Display messages Possible causes/consequences and M Solutions
À
Attention Assist:
Take a Break!
Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. A warning tone
also sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest.
À
Attention Assist
Inoperative
ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop.
Á
Drive More Slowly
You cannot change the vehicle level. Possible causes are:
R you are driving too fast for the selected vehicle level.
R you are towing a trailer.
R the trailer-coupling socket is being used, e.g. for a bicycle rack.
X Drive more slowly and then select the desired vehicle level
again.
R Vehicles with the ON&OFFROAD package (
Y
page 207)
R Vehicles with the AIRMATIC package (
Y
page 213)
X Observe the notes on towing a trailer (
Y
page 257).
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