MTU 4R 1000 SERIES, Operating Instructions Manual

Page: 40 / 88

R
Idling speed is set automatically depending
on the coolant temperature.
R
When the vehicle is stationary, the engine is
running and the transmission is in neutral,
the engine increases throttle only slowly.
AdBlue
®
/DEF level
The AdBlue
®
/DEF gauge is the responsibility
of the vehicle manufacturer. It is not neces-
sarily supplied by Mercedes-Benz. Daimler
AG recommends that the vehicle manufac-
turer uses an AdBlue
®
/DEF gauge and an
AdBlue ® /DEF indicator lamp for the
AdBlue
®
/DEF reserve level
Ø
.
The AdBlue
®
/DEF reducing agent is required
for reduction of engine emissions.
The MOT approval/operating permit is inva-
lidated if the vehicle is operated without
AdBlue
®
/DEF. The legal consequence of this
is that the vehicle may no longer be operated
on public roads.
If the AdBlue
®
/DEF level has sunk to approx-
imately 10%, a warning lamp for the AdBlue
®
/
DEF reserve level lights up on the instrument
panel. Top up the AdBlue
®
/DEF tank in good
time (
Y
page 49).
If the display is ignored and the AdBlue
®
/DEF
level drops further, engine torque and engine
speed may be reduced (
Y
page 36).
The engine torque can be limited to a maxi-
mum of 20% across the whole engine speed
range. The engine speed can be limited to
idling speed.
38
Displays
Operation