238
Driving
Engaging the retarder
Engage the retarder by moving the
right-hand steering column switch
down. The retarder has four positions
(OFF, A, B and C).
The braking steps of the retarder are as
follows:
1. 'OFF' position:
the retarder is not active (0%).
2. Position A:
approximately 40% of the maximum
braking performance.
3. Position B:
approximately 80% of the maximum
braking performance.
4. Position C:
the maximum braking performance
(100%).
Under certain conditions the engine
brake is also activated in position C.
NOTE: With the MX Engine Brake active, a green warning indicator is
visible on the instrument panel. See section 'Warning indicators on
instrument panel' in chapter 'Master display'.
When the retarder is activated using one of the three steps, it is automatically
deactivated when:
– The clutch is operated.
– The vehicle is switched to neutral gear.
– The accelerator pedal is depressed.
In this situation, the green warning indicator starts to blink.
CAUTION: Although the wheels do not lock easily, there may be a
danger of skidding when the retarder is used on deteriorated roads.
– Reduce the use of the retarder braking force as road conditions
deteriorate.
When no longer using the retarder, return the steering column switch to the 'OFF'
position.
Using the retarder improves the braking performance. Keep the engine speed high!
Disengaging the retarder
Disengage the retarder by moving the steering column switch up to the 'OFF' position.
D001622-2
B
A
C
DW63246305.book Page 238 Friday, March 22, 2019 4:54 PM
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