Mercedes-Benz Conecto Manual page 107

Continuous braking
M54.00-0082-01
Activating continuous braking:
Danger.
Do not activate the continuous brake (re-
tarder) on a slippery road surface. The
wheels could lock - risk of skidding.
Steering column switch for retarder and cruise control (overview)
Danger.
If the accelerator pedal is operated while
the continuous brakes are active, the con-
tinuous brakes are deactivated and brak-
ing output is reduced to zero.
Caution:
Always move the combination switch
through each of the available stages to
achieve the required braking torque (do
not move it directly to the required po-
sition). It is not permitted to move the
combination switch directly to the re-
quired position except in an emergency.
However, it is acceptable to skip sever-
al stages at once if you are reducing the
braking torque. For the optimum braking
torque to be achieved, the engine should
be turning within its upper speed range
so that the coolant does not overheat.
Driver's area controls
Danger.
When the ABS system is working cor-
rectly, an activated continuous brake
is automatically deactivated if one or
both of the wheels on the driven axle
threatens to lock. If an ABS malfunction
message is present, there is no guarantee
that this function will be carried out - risk
of skidding.
2.1–2.2 Retarder stage 1–2
active
2.3–2.5 Engine brake, con-
stantly open throttle, retarder
stages 3 and 4 active
Note:
The combined effect of the
engine brake and constantly
open throttle depends on
the braking torque currently
available.
CONECTO (C628.3--)/08.2007 GB
97