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204 Driving mode
Let the engine idle for approximately two minutes
before switching it off in the following situations:
the vehicle has been driven for a prolonged
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period with the fluid coupling in operation
the vehicle has been driven for a prolonged
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period in retarder mode
the coolant temperature is above approx‐
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imately 100 °C
full engine output has been used, e.g. while
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driving in mountainous terrain or during com‐
bined operation
Stopping and switching off the engine
Stopping when crawler mode is activated
To prevent the vehicle from roll-starting when
crawler mode is activated:
Stop the vehicle.
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Apply the parking brake.
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Shift the transmission to neutral position.
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Switching off the engine
Press and release the start/stop button.
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Safeguard the vehicle against rolling away;
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use chocks if necessary.
Brakes
Notes on brake system
If the brake system is defective, braking behav‐
iour may change or the brake system may fail. If
you notice a reduction in braking power when
testing the brakes, stop the vehicle as soon as
possible while paying attention to traffic condi‐
tions. Have the brake system checked and
repaired at a qualified specialist workshop.
Always pay attention to the information in the yel‐
low (
page 129) or red (
/
/
windows, which are shown by the on-board com‐
puter if the brake system is malfunctioning. In
addition, an indicator lamp lights up in the status
area of the instrument cluster/on-board com‐
puter and a warning tone may sound. Braking
behaviour may change. The pedal travel and
pedal force required to brake the vehicle may
increase. Have the brake system checked and
repaired at a qualified specialist workshop.
The vehicle is equipped with an electronic brak‐
ing system (EBS) when it leaves the factory and
can include the following functions:
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The electronic control is able to relieve the load
on the service brake by activating the continuous
brake, depending on the vehicle load and the
weather conditions.
The control system harmonises the braking pro‐
cesses of the towing vehicle and the trailer/semi‐
trailer to ensure braking of the entire tractor/
trailer combination, continuously balancing the
braking force at individual wheels according to
weight distribution. This means the vehicle and
trailer combination has improved braking charac‐
teristics. On vehicles with disc brakes on all
axles, the electronic control system monitors the
temperature of the disc brakes.
If the electronic control detects malfunctions, a
corresponding event window appears in the on-
board computer.
If you brake hard (emergency braking) from a
speed greater than approximately 50 km/h, the
hazard warning lamps are switched on automati‐
cally. The hazard warning lamps flash at a higher
frequency.
The hazard warning lamps automatically switch
off again if you cancel emergency braking or the
vehicle comes to a standstill after emergency
braking, then pulls away again.
If the vehicle comes to a standstill after emer‐
gency braking, the hazard warning lamps con‐
tinue to flash at the normal frequency.
page 145) event
Checking the compressed-air brake system
for leaks
& WARNING Risk of accident through leaks
It is not possible to brake the vehicle if the
compressed-air brake system has a leak or if
there is insufficient reservoir pressure.
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ABS (anti-lock braking system)
ASR (acceleration skid control system)
ALB (automatic load-dependent brake)
Hill holder
BAS (Brake Assist System)
in the compressed-air brake system
Do not pull away until the required res‐
ervoir pressures have been reached.
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