Mercedes-Benz Actros 2017 Operating Instructions Manual Download Page 246

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Let the engine idle for approximately 2 minutes

before switching it off, if:

the vehicle has been driven for a prolonged

period with the hydrodynamic clutch in oper-

ation

the vehicle has been driven for a prolonged

period in retarder mode

the coolant temperature is above approx-

imately 100 †

full engine power has been used, e.g. while

driving in mountainous terrain or during com-

bined operation

To switch off the engine: press the Start/

Stop button to the first switch threshold and

then release it.

Press the Start/Stop button as far as it will go.

Turn the key back in the ignition lock as far as

it will go.

Safeguard the vehicle against rolling away;

use chocks if necessary.

Brakes

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 by a qualified specialist workshop.
Always pay attention to the information in the

yellow (

page 167) or red (

page 182) event

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

instrument cluster or the status area of the on-

board computer 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 by 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:

ABS (Anti-lock Braking System)

ASR (acceleration skid control system)

ALB (automatic load-dependent brake)

Hill holder

BAS (Brake Assist)

The electronic control is able to relieve the load

on the service brake by activating the continu-

ous brake, depending on the vehicle load and

the weather conditions.
The control system harmonises the braking pro-

cesses of the tractor vehicle and the trailer/

semitrailer to ensure braking of the entire trac-

tor/trailer combination, continuously balancing

the braking force at individual wheels according

to weight distribution. This means the vehicle

and trailer combination has improved braking

characteristics. 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 automat-

ically. The hazard warning lamps flash at a

higher frequency.
The hazard warning lamps are switched off auto-

matically if:

emergency braking is interrupted or

the vehicle comes to a standstill after the

emergency braking and then pulls away again

If the vehicle comes to a standstill after

emergency braking, the hazard warning

lamps continue to flash at the normal fre-

quency.

Checking the compressed-air brake

system for leaks

WARNING

It is not possible to brake the vehicle if the
compressed-air brake system has a leak or if
there insufficient reservoir pressure. There is
a risk of an accident.
Do not pull away until the required reservoir
pressures have been reached.
In the event of loss of pressure while driving,
immediately bring the vehicle to a halt in
accordance with the traffic conditions.
Secure the vehicle using the parking brake.

244

Brakes

Driving mode